Journal articles: 'Gas temperature measurement'

1

Lee, Jong Ho, Chung Hwan Jeon, Jae Won Hahn, Chul Woong Park, Yeoung Min Han, Soo Seok Yang, Dae Sung Lee, and Young June Chang. "CARS temperature measurement in a Liquid Kerosene fueled Gas Turbine Combustor Sector Rigs(Measurement, Temperature)." Proceedings of the International symposium on diagnostics and modeling of combustion in internal combustion engines 2004.6 (2004): 13–19. http://dx.doi.org/10.1299/jmsesdm.2004.6.13.

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Mamat, Sarizam Bin, Titinan Methong, Shinichi Tashiro, and Manabu Tanaka. "Droplet Temperature Measurement in Metal Inert Gas Welding Process by Using Two Color Temperature Measurement Method." QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY 35, no. 2 (2017): 160s—164s. http://dx.doi.org/10.2207/qjjws.35.160s.

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Kobayashi, Shigemi, Yasuo Moriyoshi, and Yoshiteru Enomoto. "Analysis of Auto-Ignition Induced in a Constant Volume Vessel by Local Gas Temperature Measurement and Visualization(Measurement, Temperature)." Proceedings of the International symposium on diagnostics and modeling of combustion in internal combustion engines 2004.6 (2004): 21–26. http://dx.doi.org/10.1299/jmsesdm.2004.6.21.

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Ruffino, Paolo, and Marino di Marzo. "Temperature and Volumetric Fraction Measurements in a Hot Gas Laden With Water Droplets." Journal of Heat Transfer 125, no. 2 (March 21, 2003): 356–64. http://dx.doi.org/10.1115/1.1561453.

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Two temperatures can be detected in a hot gas laden with water droplets. The lower one is the temperature read by a sensor immersed in the flow. This measurement is affected by significant evaporative cooling resulting in readings much below the real gas temperature. The higher one is the temperature of the gas. The difference between these two temperatures is proportional to the water volumetric fraction in the flow. On this basis, a new technique for the measurement of the water volumetric fraction is proposed. The results are compared with a conventional measurement technique based on optical methods. A novel approach to the gas temperature measurement is also introduced. The sensing device is kept at temperatures exceeding the Leidenfrost transition and therefore it is insensitive to the presence of the water droplets. Independent measurement techniques developed at the Evaporative Cooling Sensor Accuracy Test (ECSAT) facility provide the data to validate the measurements obtained with the Above Leidenfrost Temperature and Evaporative Cooling (ALTEC) sensor.

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Hubing, G. F. "THE MEASUREMENT OF GAS TEMPERATURE." Journal of the American Society for Naval Engineers 58, no. 4 (March 18, 2009): 573–85. http://dx.doi.org/10.1111/j.1559-3584.1946.tb02713.x.

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Kotarski, Mateusz, and Janusz Smulko. "Fluctuation Enhanced Gas Sensing at Modulated Temperature of Gas Sensor." International Journal of Measurement Technologies and Instrumentation Engineering 2, no. 2 (April 2012): 41–52. http://dx.doi.org/10.4018/ijmtie.2012040104.

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Taguchi gas sensors are commonly used to measure gas concentration. The standard detection method utilizes only changes of sensor DC resistance to determine various gases concentration. Unfortunately, such technique leads to false results due to cross-sensitivity of gas sensors at presence of other gases. Such adverse effects can be reduced by applying fluctuation enhanced sensing and temperature modulation of the sensor what allows to gather more information about ambient atmosphere than the sensor DC resistance only. The measurement setup of voltage fluctuations across the gas sensor as well as the selected measurements results of DC resistance under temperature modulation are presented. New indicators of gas detection have been proposed which utilize voltage fluctuations and DC resistance measurements at two selected different temperatures of the gas sensor.

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ZIPF, MATTHIAS, JOCHEN MANARA, THOMAS STARK, MARIACARLA ARDUINI, HANS-PETER EBERT, and JÜRGEN HARTMANN. "Identification of wavelength regions for non-contact temperature measurement of combustion gases at high temperatures and high pressures." High Temperatures-High Pressures 49, no. 3 (2020): 241–60. http://dx.doi.org/10.32908/hthp.v49.805.

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Stationary gas turbines are still an important part of today’s power supply. With increasing temperature of the hot combustion gas inside a gas turbine, the efficiency factor of the turbine increases. For this reason, it is intended to operate turbines at the highest possible gas temperature. Therefore, in the combustion chamber and especially at the position of the first stage guide vanes the gas temperature needs to be measured reliably. To determine the gas temperature, one promising approach is the application of a non-contact measurement method using a radiation thermometer. A radiation thermometer can measure the gas temperature remotely from outside of the harsh environment. At ZAE Bayern, a high temperature and high-pressure gas cell has been developed for this purpose in order to investigate gases and gas mixtures under defined conditions at high pressures and high temperatures. This gas cell can be placed in a FTIR-spectrometer in order to characterize the infrared-optical properties of the gases. In this work the measurement setup is introduced and gas mixtures, which are relevant for gas turbine applications are analyzed thoroughly. The derived results are presented and discussed in detail. To identify suitable wavelength regions for non-contact gas temperature measurements, first tests have been performed. Based on these tests, an appropriate wavelength region could be chosen, where future gas temperature measurements can be carried out.

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Zhu, Xiaorui, Shunchun Yao, Wei Ren, Zhimin Lu, and Zhenghui Li. "TDLAS Monitoring of Carbon Dioxide with Temperature Compensation in Power Plant Exhausts." Applied Sciences 9, no. 3 (January 28, 2019): 442. http://dx.doi.org/10.3390/app9030442.

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Temperature variations of flue gas have an effect on carbon dioxide (CO2) emissions monitoring. This paper demonstrates accurate CO2 concentration measurement using tunable diode laser absorption spectroscopy (TDLAS) with temperature compensation methods. A distributed feedback diode laser at 1579 nm was chosen as the laser source for CO2 measurements. A modeled flue gas was made referring to CO2 concentrations of 10–20% and temperatures of 298–338 K in the exhaust of a power plant. Two temperature compensation methods based on direct absorption (DA) and wavelength modulation (WMS) are presented to improve the accuracy of the concentration measurement. The relative standard deviations of DA and WMS measurements of concentration were reduced from 0.84% and 0.35% to 0.42% and 0.31%, respectively. Our experimental results have validated the rationality of temperature compensations and can be further applied for high-precision measurement of gas concentrations in industrial emission monitoring.

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EJIRI, Haruki. "Gas Temperature Measurement by Emission Spectroscopy." Journal of The Institute of Electrical Engineers of Japan 142, no. 11 (November 1, 2022): 698–700. http://dx.doi.org/10.1541/ieejjournal.142.698.

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Venkateshan, S. P., P. Shakkottai, E. Y. Kwack, and L. H. Back. "Acoustic Temperature Profile Measurement Technique for Large Combustion Chambers." Journal of Heat Transfer 111, no. 2 (May 1, 1989): 461–66. http://dx.doi.org/10.1115/1.3250699.

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Measurement of times of flight of sound waves can be used to determine temperatures in a gas. This paper describes a system, based on this principle, that is capable of giving the temperature profile in a nonisothermal gas volume, for example, prevalent in a large furnace. The apparatus is simple, rugged, accurate, and capable of being automated for process control applications. It is basically an acoustic waveguide where the outside temperature profile is transferred to a chosen gas contained inside the guide.

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Lou, Xiutao, Gabriel Somesfalean, Zhiguo Zhang, and Shaohua Wu. "Temperature-Corrected Oxygen Detection Based on Multi-Mode Diode Laser Correlation Spectroscopy." Journal of Spectroscopy 2013 (2013): 1–8. http://dx.doi.org/10.1155/2013/524071.

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Temperature-corrected oxygen measurements were performed by using multi-mode diode laser correlation spectroscopy at temperatures ranging between 300 and 473 K. The experiments simulatein situmonitoring of oxygen in coal-combustion exhaust gases at the tail of the flue. A linear relationship with a correlation coefficient of−0.999was found between the evaluated concentration and the gas temperature. Temperature effects were either auto-corrected by keeping the reference gas at the same conditions as the sample gas, or rectified by using a predetermined effective temperature-correction coefficient calibrated for a range of absorption wavelengths. Relative standard deviations of the temperature-corrected oxygen concentrations obtained by different schemes and at various temperatures were estimated, yielding a measurement precision of 0.6%.

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Li, Han Yong, Yun Zhang, and Huan Wang. "Gas Solubility Measurement for Waxy Crude Oil Saturated with Nitrogen and Natural Gas." Advanced Materials Research 339 (September 2011): 603–6. http://dx.doi.org/10.4028/www.scientific.net/amr.339.603.

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With self-developed solubility determining unit, gas volume solubility of Daqing waxy crude oil saturated with nitrogen and natural gas was measured respectively at temperatures of 50°C, 55°C, 60°C and 65°C and under pressures from 2 to 20 MPa. The gas volume solubility in the crude oil is increased with the increasing of pressure for both nitrogen and natural gas at every temperature tested, which the increased extent of gas solubility of natural gas is much higher than that of nitrogen. Solubility of natural gas increases with the decreasing of temperature, but that of nitrogen increases with the increasing of temperature. Pressure has a main effect on gas volume solubility.

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Marr, R., J. R. Wynnyckyj, and E. Rhodes. "Pyrometric measurement of dust-laden gas temperature." Metallurgical Transactions B 21, no. 1 (February 1990): 27–35. http://dx.doi.org/10.1007/bf02658113.

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George, Benny, and N. Muthuveerappan. "Error Estimation of Measured Exhaust Gas Temperature in Afterburner Mode in an Aero Gas Turbine Engine." Defence Science Journal 72, no. 1 (January 5, 2022): 10–17. http://dx.doi.org/10.14429/dsj.72.16824.

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In a turbofan engine, thrust is a key parameter which is measured or estimated from various parameters acquired during engine testing in an engine testbed. Exhaust Gas Temperature (EGT) is the most critical parameter used for thrust calculation. This work presents a novel way to measure and correct the errors in EGT measurement. A temperature probe is designed to measure EGT in the engine jet pipe using thermocouples. The temperature probe is designed to withstand the mechanical and temperature loads during the operation. Structural analysis at the design stage provided a strength margin of 90% and eigenfrequency margin of more than 20%. Thermal analysis is carried out to evaluate maximum metal temperature. Errors are quite high in high-temperature measurements which are corrected using the available methodologies. The velocity error, conduction error, and radiation error are estimated for the measured temperature. The difference of 97 K between the measured gas temperature and calculated gas temperature from measured thrust is explained. The estimated velocity error is 1 K, conduction error is 3 K, and radiation error is 69 K. Based on the error estimation, the measurement error is brought down to 24 K. After applying the above corrections, the further difference of 24 K between measured and estimated value can be attributed to thermocouple error of +/-0.4% of the reading for class 1 accuracy thermocouple, other parameter measurement errors, and analysis uncertainties. The present work enables the designer to calculate the errors in high-temperature measurement in a turbofan engine.

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Liu, Budong, Qinhuang Huang, and Peiyong Wang. "Analysis of surrounding gas temperature influence on thermocouple measurement temperature." Journal of Physics: Conference Series 1509 (April 2020): 012004. http://dx.doi.org/10.1088/1742-6596/1509/1/012004.

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Volkov, Roman S., Ivan S. Voytkov, and Pavel A. Strizhak. "Temperature Fields of the Droplets and Gases Mixture." Applied Sciences 10, no. 7 (March 25, 2020): 2212. http://dx.doi.org/10.3390/app10072212.

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In this research, we obtain gas–vapor mixture temperature fields generated by blending droplets and high-temperature combustion products. Similar experiments are conducted for droplet injection into heated air flow. This kind of measurement is essential for high-temperature and high-speed processes in contact heat exchangers or in liquid treatment chambers, as well as in firefighting systems. Experiments are conducted using an optical system based on Laser-Induced Phosphorescence as well as two types of thermocouples with a similar measurement range but different response times (0.1–3 s) and accuracy (1–5 °C). In our experiments, we inject droplets into the heated air flow (first scheme) and into the flow of high-temperature combustion products (second scheme). We concentrate on the unsteady inhomogeneous temperature fields of the gas–vapor mixture produced by blending the above-mentioned flows and monitoring the lifetime of the relatively low gas temperature after droplets passes through the observation area. The scientific novelty of this research comes from the first ever comparison of the temperature measurements of a gas–vapor–droplet mixture obtained by contact and non-contact systems. The advantages and limitations of the contact and non-contact techniques are defined for the measurement of gas–vapor mixture temperature.

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Iffa, E. D., A. R. A. Aziz, and A. S. Malik. "Gas Flame Temperature Measurement Using Background Oriented Schlieren." Journal of Applied Sciences 11, no. 9 (April 15, 2011): 1658–62. http://dx.doi.org/10.3923/jas.2011.1658.1662.

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Tanaka, Manabu, and Shinichi Tashiro. "Electron temperature measurement of tungsten inert gas arcs." Thin Solid Films 516, no. 19 (August 2008): 6628–33. http://dx.doi.org/10.1016/j.tsf.2007.11.036.

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Liu, Budong, Qinhuang Huang, and Peiyong Wang. "Influence of surrounding gas temperature on thermocouple measurement." Case Studies in Thermal Engineering 19 (June 2020): 100627. http://dx.doi.org/10.1016/j.csite.2020.100627.

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Kuz'menko, K. P., V. A. Merkulov, V. M. Nikolaev, and A. S. Bobkov. "Determining thermoelectric-thermometer error in gas temperature measurement." Measurement Techniques 31, no. 2 (February 1988): 155–56. http://dx.doi.org/10.1007/bf00864257.

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Wozniak, Oleksandr, and Andrii Shtuts. "RESEARCH NATURAL GAS TEMPERATURE CONTROL SYSTEM." ENGINEERING, ENERGY, TRANSPORT AIC, no. 3(110) (October 30, 2020): 34–50. http://dx.doi.org/10.37128/2520-6168-2020-3-4.

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Technological progress is characterized by continuous expansion of automation of all sectors of human activity, the transition from partial automation to integrated, and then from integrated automation to complete, which provides the highest technical and economic efficiency. The 21st century is called the information age, because the main successes of technological progress are now observed precisely in the introduction of information technology to various means and systems of automation. Automation is not possible without measuring equipment. The development of control and measurement technology for automation systems is largely determined by advances in compatible fields of science and technology - in microelectronics, computing, solid state physics, etc. It is for the developers of automation systems and control of various technological parameters that the most favorable environment of practical activity is now created in the form of a huge nomenclature of miniature and reliable sensors, which are easily combined with secondary equipment and allow to transmit measurement information over long distances in the conditions of intensive industrial interferences. Temperature measurement and control tools have long been at the forefront of automated control of many technical processes, the complication of which leads to the need for a sharp increase in the number of measurement channels to obtain complete and objective information about the temperature modes of the processes. In this regard, a computerized temperature control system for crude natural gas air coolers (APOs) is no different than sophisticated industrial automation systems. Given the fact that gas pipelines are an important part of the industrial complex of Ukraine, the development of a modern computerized temperature control system for air coolers for raw natural gas is, without doubt, an urgent scientific and technical task.

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Cięszczyk, Sławomir. "A Multi-Band Integrated Virtual Calibration-Inversion Method for Open Path FTIR Spectrometry." Metrology and Measurement Systems 20, no. 2 (June 1, 2013): 287–98. http://dx.doi.org/10.2478/mms-2013-0025.

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Abstract This paper addresses problems arising from in situ measurement of gas content and temperature. Such measurements can be considered indirect. Transmittance or natural radiation of a gas is measured directly. The latter method (spectral radiation measurement) is often called spectral remote sensing. Its primary uses are in astronomy and in the measurement of atmospheric composition. In industrial processes, in situ spectroscopic measurements in the plant are often made with an open path Fourier Transform Infrared (FTIR) spectrometer. The main difficulty in this approach is related to the calibration process, which often cannot be carried out in the manner used in the laboratory. Spectral information can be obtained from open path spectroscopic measurements using mathematical modeling, and by solving the inverse problem. Determination of gas content based on spectral measurements requires comparison of the measured and modeled spectra. This paper proposes a method for the simultaneous use of multiple lines to determine the gas content. The integrated absorptions of many spectral lines permits calculation of the average band absorption. An inverse model based on neural networks is used to determine gas content based on mid-infrared spectra at variable temperatures.

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Gao, Qiang, Wubin Weng, Bo Li, Marcus Aldén, and Zhongshan Li. "Gas Temperature Measurement Using Differential Optical Absorption Spectroscopy (DOAS)." Applied Spectroscopy 72, no. 7 (June 18, 2018): 1014–20. http://dx.doi.org/10.1177/0003702818760864.

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A nonintrusive method for flow gas temperature measurement using differential optical absorption spectroscopy (DOAS) was demonstrated. A temperature-dependent spectra (TDS) originated from the DOAS spectra of sulfur dioxide (SO2) in the wavelength range of 276–310 nm was introduced, and the relationship between the TDS and the temperature was built through experimental calibration process. This relationship is found to be independent of SO2 concentration and can be used for temperature measurements. The experimental results indicated that the precision of the TDS method is < ± 0.3% for SO2 concentrations higher than 150 ppm with the optical path length of 170 mm. For lower concentrations, the precision is estimated to be ± 0.4% at 1 ppm. The relative deviation between the temperature measured by the TDS method and that measured by a thermocouple is within 3% in the temperature range of 298–750 K, and the TDS method has a quicker response to the fast-changing temperature than the thermocouple.

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Supriatno, Supriatno. "COMBINATION OF THE ISOCHORIC METHOD AND THE EXPANSION METHOD TO DETERMINE DENSITIES OF HYDROGEN AT TEMPERATURES UP TO 500°C." SINERGI 22, no. 2 (June 27, 2018): 107. http://dx.doi.org/10.22441/sinergi.2018.2.006.

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Utilization of hydrogen as an alternative fuel is promising because it is environmentally friendly. Hydrogen system design requires accurate hydrogen densities. The density of hydrogen is determined based on experimental data. For gases that have a low density such as hydrogen, the effective measurement method is required. An apparatus has been designed to measure PVT properties of hydrogen at pressures up to 1 MPa and temperatures up to 500ºC. The apparatus uses a combination of isochoric and expansion methods. The method doesn’t need a measurement of pressures and temperatures along the isochoric line as required usually in the isochoric conventional method. Moreover, it doesn't need direct measurements of gas mass and gas volume. The volume was determined by measuring nitrogen at a pressure of 0.5 MPa and at temperatures up to 500ºC and by using Span’s equation of state. Measurements of hydrogen have been performed at a pressure up to 0.7 MPa and temperatures up to 498.217ºC. Densities of hydrogen obtained from the present measurement are compared with that obtained from calculation of Leachman's equation of state. Maximum deviation is 1.42% at a temperature of 498.217ºC and at a pressure of 0.2947 MPa and minimum deviation is 0.11% at temperature and pressure of 399.461ºC and 0.6981 MPa respectively.

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Dutz, Franz J., Sven Boje, Ulrich Orth, Alexander W. Koch, and Johannes Roths. "High-Temperature Profile Monitoring in Gas Turbine Exhaust-Gas Diffusors with Six-Point Fiber-Optic Sensor Array." International Journal of Turbomachinery, Propulsion and Power 5, no. 4 (September 24, 2020): 25. http://dx.doi.org/10.3390/ijtpp5040025.

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In this paper, the deployment of a newly developed, multipoint, fiber-optic temperature-sensor system for temperature distribution measurements in a 6 MW gas turbine is demonstrated. The optical sensor fiber was integrated in a stainless steel protection cable with a 1.6 mm outside diameter. It included six measurement points, distributed over a length of 110 mm. The sensor cable was mounted in a temperature probe and was positioned radially in the exhaust-gas diffusor of the turbine. With this temperature probe, the radial temperature profiles in the exhaust-gas diffusor were measured with high spatial and temporal resolution. During a test run of the turbine, characteristic temperature gradients were observed when the machine operated at different loads.

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Zhang, Sheng Li, Yi Luo, Li Na Wang, Chun Yan Li, Hao Sun, Wei Xie, Wen Sheng Liu, and Jin Xiu Wang. "Research and Application of Weighing Low Temperature and Mobile Metering Device." Advanced Materials Research 706-708 (June 2013): 920–23. http://dx.doi.org/10.4028/www.scientific.net/amr.706-708.920.

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The accuracy and stability of dynamometer diagram measurement are key assessment index for this technology. At present, separator measurement data is mostly taken as comparison benchmark for evaluation of dynamometer diagram measurement in Huabei Oilfield, resulting in large error in comparison. In view of existence of gas, water and pressure, gas/liquid separation of produced fluid is followed by separating measurement of gas and liquid. Gas and liquid mixture are measured by flow meter and weighing method, respectively. Higher precision measurement data is obtained. In combination with PLC programming control, this technology can realize fully automatic and continuous measurement. This device has been applied in 126 wells in Huabei Oilfield. Assisted by dynamometer diagram measurement software, point-to-point calibration and correction method of yield measurement is improved[.

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Li, Chen, Qiyun Feng, Yingping Hong, Lixia Gao, Ximing Guo, Wenzhi Xue, and Jijun Xiong. "Wireless LC Conformal Temperature Sensor Based on Ag Film (9912-K FL) for Bearing Temperature Measurement." Nanomaterials 12, no. 17 (August 23, 2022): 2899. http://dx.doi.org/10.3390/nano12172899.

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As the key component of aero-engines and industrial gas turbines, a bearing’s working temperature at high speed is close to 300 ℃. The measurement of an engine bearing’s temperature is of great significance to ensure flight safety. In this study, we present a wireless LC conformal temperature sensor for bearing temperatures, which integrates silver on the bearing surface in situ through a screen-printing process. This process makes Ag film (9912-K FL) firmly adhere to the bearing surface and realizes wireless measurements for bearing temperatures in situ. A high-temperature holding experiment of the prepared sensor was conducted, and the results showed that the sensor can work stably for 10 h at 300 ℃. We tested the designed wireless LC conformal temperature sensor at 20–270 ℃. The results showed that the proposed temperature sensor attained as good accuracy and stability in the temperature range 20–270 ℃. The sensitivity of the temperature measurements was 20.81 KHz/℃ when the bearing rotateds, the maximum repeatability was 0.039%, the maximum uncertainty was 0.081%, and the relative error was stable within 0.08%.

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FUMIZAWA, Motoo, and Takakazu TAKIZUKA. "Measurement of gas permeability in graphite for high temperature gas-cooled reactor." Journal of the Atomic Energy Society of Japan / Atomic Energy Society of Japan 31, no. 4 (1989): 465–67. http://dx.doi.org/10.3327/jaesj.31.465.

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Winterstein, Jonathan P., Pin Ann Lin, and Renu Sharma. "Temperature Calibration forIn SituEnvironmental Transmission Electron Microscopy Experiments." Microscopy and Microanalysis 21, no. 6 (October 6, 2015): 1622–28. http://dx.doi.org/10.1017/s1431927615015196.

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AbstractIn situenvironmental transmission electron microscopy (ETEM) experiments require specimen heating holders to study material behavior in gaseous environments at elevated temperatures. In order to extract meaningful kinetic parameters, such as activation energies, it is essential to have a direct and accurate measurement of local sample temperature. This is particularly important if the sample temperature might fluctuate, for example when room temperature gases are introduced to the sample area. Using selected-area diffraction (SAD) in an ETEM, the lattice parameter of Ag nanoparticles was measured as a function of the temperature and pressure of hydrogen gas to provide a calibration of the local sample temperature. SAD permits measurement of temperature to an accuracy of ±30°C using Ag lattice expansion. Gas introduction can cause sample cooling of several hundred degrees celsius for gas pressures achievable in the ETEM.

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Sheard, A. G. "Blade by Blade Tip Clearance Measurement." International Journal of Rotating Machinery 2011 (2011): 1–13. http://dx.doi.org/10.1155/2011/516128.

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This paper describes a capacitance-based tip clearance measurement system which engineers have used in the most demanding turbine test applications. The capacitance probe has survived extended use in a major European gas turbine manufacturer's high-temperature demonstrator unit, where it functioned reliably at a turbine entry temperature in excess of 1800 degrees Kelvin. This paper explores blade by blade tip clearance measurement techniques and examines probe performance under laboratory conditions in support of high-temperature installations. The paper outlines the blade by blade tip clearance measurement technique and describes the experimental facility used to study tip clearance measurement. The paper also fully describes the method used to calibrate the measurement system in order to ascertain measurement accuracy. The paper clarifies how the practical problems were overcome associated with making blade by blade tip clearance measurements in both compressor and turbine environments. Since its initial development, gas turbine development programmes have routinely used the clearance measurement system. The inherent robustness of the system has resulted in reliable in-service measurement of clearance in real world applications.

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Araguás Rodríguez, Silvia, Tomáš Jelínek, Jan Michálek, Álvaro Yáñez González, Fiona Schulte, Christopher Pilgrim, Jorg Feist, and Stephen J. Skinner. "Accelerated thermal profiling of gas turbine components using luminescent thermal history paints." Journal of the Global Power and Propulsion Society 2 (April 25, 2018): S3KTGK. http://dx.doi.org/10.22261/jgpps.s3ktgk.

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Abstract Environmental requirements to reduce CO2 emissions and the drive towards higher efficiencies have resulted in increased operating temperatures in gas turbines. Subsequently, Original Equipment Manufacturer (OEMs) require improved component design and material selection to withstand the harsher conditions. This demands rapid evaluation of new components and their surface temperature to accelerate their market entry. Accurate temperature information proves key in the design of more efficient, longer-lasting machinery and in monitoring thermal damage. A number of traditional temperature measurement techniques are available, but can incur a number of limitations. Online temperature measurements, such as pyrometry or phosphor thermography, often require optical access to the component during operation and are therefore not suitable for inaccessible components. Other options including thermocouples can only provide point measurements and cannot deliver profiles across the surface. Offline techniques store temperature information that can be measured and analysed following operation. Several of these, however, are of destructive nature, can affect local thermal gradients and only provide point measurements. This article discusses an innovative offline measurement technique: luminescent Thermal History Paints (THPs). THPs are comprised of ceramic pigments in a binder matrix that can be applied to any hot component as a thin coating. These pigments are doped with optically active ions, which will phosphoresce when excited with a light source. The coating material experiences irreversible structural changes depending on the temperature it is exposed to. Changes in the material structure are reflected in its phosphorescent properties, which are measured with standard optical instrumentation at any surface location. Since the changes are permanent, the temperature information is stored in the coating and can be extracted after operation. Following calibration, it is therefore possible to relate phosphorescent behaviour to the past maximum temperature experienced at each location. This is done with Sensor Coating Systems Ltd. (SCS)’s portable instrumentation, which can provide rapid, automated and objective measurements across a component surface. Unlike the more traditional thermal paints, THPs are non-toxic, and provide a continuous measurement capability across the range 150°C–900°C with significantly improved durability. This article describes the underlying principles behind this novel technology and the advantages it provides over existing state-of-the-art methods. The benefits will be demonstrated through measurements on nozzle guide vanes (NGVs), with the view to compare and validate them against thermocouple measurements. The results show that the THP extends the limited information from thermocouples to provide a more complete view of the thermal processes on the component.

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Ceretely, A. A., and A. A. Elshin. "Gas temperature measurement on turbine core by using maximum temperature crystal meter." Aviation Engines, no. 2 (2019): 31–38. http://dx.doi.org/10.54349/26586061_2019_2_31.

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Li, Shen, Wubin Weng, Chengdong Kong, Marcus Aldén, and Zhongshan Li. "Dual-Laser-Induced Breakdown Thermometry via Sound Speed Measurement: A New Procedure for Improved Spatiotemporal Resolution." Sensors 20, no. 10 (May 14, 2020): 2803. http://dx.doi.org/10.3390/s20102803.

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Measurement of acoustic waves from laser-induced breakdown has been developed as gas thermometry in combustion atmospheres. In the measurement, two laser-induced breakdown spots are generated and the local gas temperature between these two spots is determined through the measurement of the sound speed between them. In the previous study, it was found that the local gas breakdown can introduce notable system uncertainty, about 5% to the measured temperature. To eliminate the interference, in present work, a new measurement procedure was proposed, where two individual laser pulses with optimized firing order and delay time were employed. With the new measurement procedure, the system uncertainty caused by local gas breakdown can be largely avoided and the temporal and spatial resolutions can reach up to 0.5 ms and 10 mm, respectively. The improved thermometry, dual-laser-induced breakdown thermometry (DLIBT), was applied to measure temperatures of hot flue gases provided by a multijet burner. The measured temperatures covering the range between 1000 K and 2000 K were compared with the ones accurately obtained through the two-line atomic fluorescence (TLAF) thermometry with a measurement uncertainty of ~3%, and a very good agreement was obtained.

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SATO, Takuso, Eisuke TOHJIMA, Norio MASUDA, and Yoshiki YAMAKOSHI. "Gas Temperature Distribution Measurement Using Nonlinear Effect of Ultrasonics." Transactions of the Society of Instrument and Control Engineers 23, no. 6 (1987): 551–57. http://dx.doi.org/10.9746/sicetr1965.23.551.

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ISOBE, Kyohei, Chungpyo HONG, Yutaka ASAKO, and Ichiro UENO. "20803 lbtal temperature measurement of gas now from micro'tube." Proceedings of Conference of Kanto Branch 2013.19 (2013): 401–2. http://dx.doi.org/10.1299/jsmekanto.2013.19.401.

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Li, H., C. Xiao, E. Zhang, A. K. Singh, and A. Hirose. "Measurement of neutral gas temperature in inductively coupled plasmas." Radiation Effects and Defects in Solids 166, no. 6 (June 2011): 399–407. http://dx.doi.org/10.1080/10420150.2011.566876.

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Chang, Zijun, Qingming Liu, and Yang Shen. "Measurement of Gas Temperature and Concentration Based on TDLAS." IOP Conference Series: Materials Science and Engineering 538 (June 4, 2019): 012039. http://dx.doi.org/10.1088/1757-899x/538/1/012039.

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Nishimura, Tomotaka, Eiji Tomita, and Nobuyuki Kawahara. "1003 Measurement of transience gas temperature with laser interferometry." Proceedings of Conference of Chugoku-Shikoku Branch 2015.53 (2015): _1003–1_—_1003–2_. http://dx.doi.org/10.1299/jsmecs.2015.53._1003-1_.

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Liu, Jikun, Cuixia Wang, Xueqiu He, and Shugang Li. "Infrared measurement of temperature field in coal gas desorption." International Journal of Mining Science and Technology 24, no. 1 (January 2014): 57–61. http://dx.doi.org/10.1016/j.ijmst.2013.12.010.

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Gao, Shan, Chi Feng, Lixin Wang, and Dong Li. "Multi-spectral temperature measurement method for gas turbine blade." Optical Review 23, no. 1 (November 26, 2015): 17–25. http://dx.doi.org/10.1007/s10043-015-0155-9.

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Zashchepkina, N. M., and M. P. Svyta. "Gas temperature meter." Journal of Achievements in Materials and Manufacturing Engineering 111, no. 1 (March 1, 2022): 33–41. http://dx.doi.org/10.5604/01.3001.0015.9095.

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Purpose: of the article is to develop a digital portable gas temperature meter in the range of -50…+600°C. To measure the temperature of dusty gas flows in the air pollution sources with the least significant digit of the digital device 1°C. Design/methodology/approach: The microprocessor measuring unit, probe and software is proposed. It leads to build a high-precision temperature meter based on a thin film sensor HM220 type "pt100". Findings: The calculation of the electrical schematic diagram parameters for signal conditioning of the sensor relative to the input range of the analog-to-digital converter. The experimental measuring unit and the probe of the gas temperature meter are assembled. The principle of the gas temperature meter calibration with the help of a precision resistance box MSR-60M is considered. The experimental gas temperature meter has a total standard uncertainty determined by type B for a maximum value of the measurement range of 1.94°C. The error of the sensor "pt100" makes the largest contribution to the total standard uncertainty, so the error increases in proportion to the value of the measured temperature. Research limitations/implications: On the basis of the proposed design of gas temperature meter it is possible to construct devices with various lengths of probes. Practical implications: The proposed meter is designed for environmental laboratories that measure the velocity, flow and sampling of dust and gas emissions from sources of air pollution. Originality/value: The device design differs due to the use of thermostable wire made of constantan as extending conductors of the temperature sensor, which is included in the unbalanced Wheatstone bridge. This solution allows the use of unipolar power supply 3.3 V for both analog and digital part of the meter. Temperature meter based on a thin film resistance thermometer is characterized by relative ease of manufacture, low material consumption, cost and high reliability.

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Iskandarov, Nabi. "Mathematical Study of Temperature Measurement by Thermocouple in Chemical Processes." Oriental Journal Of Chemistry 38, no. 3 (June 30, 2022): 547–54. http://dx.doi.org/10.13005/ojc/380304.

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Processing of oil, gas and gas condensate is one of the most widespread areas of modern chemical-technological processes. Due to the safety of chemical and technological process management, strict requirements have been set for the quality of processes in the oil and gas refining and petrochemical industries. During chemical-technological processes in the oil and gas industry, the fractional composition of the product, the typical boiling point, the octane number of gasoline, the cetane number of diesel fuel, the evaporation temperature, the ignition temperature and other parameters must be determined with special accuracy. This set of characteristics is used in the laboratory assessment of the quality of oil, oil products and gas condensate. Temperature measurements performed during such processes must have maximum accuracy. For this reason, the determination of temperature by thermocouples in the above-mentioned chemical processes has been mathematically studied and evaluated during the research.

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Xia, Hua, Doug Byrd, Sachin Dekate, and Boon Lee. "High-Density Fiber Optical Sensor and Instrumentation for Gas Turbine Operation Condition Monitoring." Journal of Sensors 2013 (2013): 1–10. http://dx.doi.org/10.1155/2013/206738.

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Gas turbine operation control is normally based on thermocouple-measured exhaust temperatures. Due to radiation shielding and bulky package, it is difficult to provide high spatial resolution for measuring can-to-can combustion temperature profile at the exhaust duct. This paper has demonstrated that wavelength-division-multiplexing-based fiber Bragg grating sensors could provide high spatial resolution steady and dynamic temperature measurements. A robust sensor package can be designed with either circumferential sensing cable or radial sensing rake for quasi-distributing multiple fiber sensors in the gas turbine environment. The field validations have demonstrated that quasi-distributed fiber sensors have not only demonstrated its temperature measurement accuracy compared to existing thermocouple sensors but also shown its unique dynamic response amplitude and power spectra that could be utilized for gas turbine transient operation condition monitoring and diagnostics.

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Yao, Ming Lin, Yu Jun Guan, and Cui Ying Dong. "Design of Ultrasonic Gas Temperature Measurement System with Humidity Self-Correction." Advanced Materials Research 383-390 (November 2011): 5166–70. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.5166.

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In the ultrasonic gas temperature measurement system, the principle is that the velocity of sound in gas is a function of temperature. But because the propagation speed of ultrasonic wave can be easily affected by humidity, the accuracy of the gas temperature measurement will be affected too. This dissertation will implement the ultrasonic gas temperature measurement system with humidity correction suitable for all kinds of environment humidity. This type of ultrasonic technique is a highly efficient algorithm with the advantages of both time-of-flight method and phase shift method. And the system is realized with a single-chip microcomputer-based with a relative humidity/water vapor pressure meter. The main advantages of this ultrasonic temperature measurement system are high resolution, using narrow-bandwidth ultrasonic transducer of low cost and ease of implementation.

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Gong, Sannai, and Kenneth A. Corey. "METHOD FOR MEASUREMENT OF GAS PERMEABILITY OF POLYMERIC FILMS." HortScience 27, no. 11 (November 1992): 1162d—1162. http://dx.doi.org/10.21273/hortsci.27.11.1162d.

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A rapid steady state method for measurement of gas permeability of polymeric films was developed. Films were sealed between two equal volume chambers with pure O2 and pure N2 flowing through opposite sides. Oxygen concentration in the N2 cell was measured over time until steady state was reached. The method was used to determine oxygen permeability of two different films. Results from four replications on each film indicated excellent repeatability with coefficients of variation less than 3%. The time required to reach steady state oxygen concentration was dependent upon film type, flow rate, and temperature. The higher the N2 flow rate the shorter the time to reach steady state O2 concentrations. The slowest measurement at the lowest flow rate of 27 ml/min took less than 3 hours to collect the data necessary to achieve steady state. Increasing temperature from 10°C to 20°C resulted in an approximately 40% increase in O2 permeability for both films tested. The technique will be a valuable tool for measuring permeabilities of new films and the same film at different temperatures, and for selecting the appropriate material for modified atmosphere packaging of fresh produce.

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Janu, Premysl, and Sang Van Doan. "Multifunctional Signal Generator for Calibration System of Jet Engine Exhaust Gas Temperature Measurement." Periodica Polytechnica Transportation Engineering 47, no. 1 (August 9, 2017): 25–28. http://dx.doi.org/10.3311/pptr.9452.

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One of the most important systems of an aircraft jet engine is exhaust gas temperature measurement system that ensure right function of the engine. Temperature of the gas flowing from the engine turbine is quite high. There is one way, how to measure high temperature and it is by thermocouple. So the main aim of the paper is to describe creation and correct function analysis of a thermocouple simulator. Thermocouple generates very low voltage depending on a temperature that ranges from units micro-volts to several tens of millivolts. Generating of such low voltage using simulator is not easy, because this voltage may move at levels of noise. Voltage generation is performed by digital-analogue converter, which is controlled by a microcontroller via SPI bus. The generated voltage is further reduced to a level corresponding to the voltage output of the thermocouple. Several calibration waveforms are performed belonging to appropriate thermocouple type for multifunctional use. Only positive temperatures are generated, because exhaust gas temperature measurement system is aimed at high temperatures. The power supply circuit offers two options. It is supply from accumulator for its portability or from the laboratory power supply. Surface mounted devices are selected in terms of module miniaturization. The newest device base is chosen for modern design of the module. The temperature waveform is generated by the way of polynomial approximation with correction. Dependence of real generated voltage on the voltage, which is defined by appropriate thermocouple type standard and errors evaluation, is used as a proof of proper function.

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Paul, C. E., Alain deChamplain, and B. Paquet. "GAS TEMPERATURE MEASUREMENT AT THE EXIT PLANE OF A TYPICAL GAS TURBINE COMBUSTOR." International Journal of Energetic Materials and Chemical Propulsion 11, no. 1 (2012): 89–95. http://dx.doi.org/10.1615/intjenergeticmaterialschemprop.2012005395.

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Fedynets, Vasyl, Ihor Vasylkivskyi, and Yaroslav Yusyk. "Optimization of Gas Dynamical Subsystem of Transducers for Measurement of Gas Flow Temperature." Energy Engineering and Control Systems 2, no. 2 (2016): 43–48. http://dx.doi.org/10.23939/jeecs2016.02.043.

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Dudek, Adrian. "Wpływ warunków środowiskowych i instalacyjnych na proces wymiany ciepła w wybranych przemysłowych gazomierzach miechowych." Nafta-Gaz 76, no. 11 (November 2020): 828–36. http://dx.doi.org/10.18668/ng.2020.11.08.

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Since 2016, Oil and Gas Institute – National Research Institute (INiG – PIB) has been conducting new research to determine the relationship between ambient temperature and gas temperature in industrial diaphragm gas meters during the measurement, and to develop new recommendations for billing systems using industrial diaphragm gas meters with a throughput of until 25 m3/h. In the first stage, work was carried out, in which the obtained test results confirmed that the heat exchange process in an industrial diaphragm gas meter depends on the ambient temperature, the gas temperature at the inlet to the gas meter, the flow rate of the gas flowing, as well as the casing surface and the gas volume of the gas meter. In the next stage, work was carried out to determine the relationship between ambient temperature and gas temperature at the industrial diaphragm gas meter connection during the measurement. The obtained results undermined the thesis, which indicated that the gas inlet temperature is equal to the gas temperature at the depth of the gas network. In the last stage, work was carried out to determine the course of changes in gas temperature in industrial diaphragm gas meters as a function of ambient temperature and cyclical changes of the gas flow rate, which were to reflect the work of gas meters installed at customers’ premises. The analysis of the obtained test results once again showed a strong dependence of the gas temperature inside industrial diaphragm gas meters on the ambient temperature, but also on the flow rate of gas. The obtained results of laboratory tests will be used to carry out a thermodynamic description of the heat exchange process in an industrial diaphragm gas meter, which would allow the determination of the gas billing temperature as a function of the ambient temperature, the temperature of the inflowing gas and the gas flow rate. The calculated gas temperature values could be used to determine the temperature correction factors applicable when settling gas consumers billed on the basis of measurement with the use of industrial diaphragm gas meters.

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Zainuri, Ahmad, Gurum Ahmad Pauzi, Junaidi Junaidi, and Warsito Warsito. "Web Monitoring CO, CO2 dan Suhu secara Real Time." Journal of Energy, Material, and Instrumentation Technology 1, no. 1 (May 31, 2020): 1–6. http://dx.doi.org/10.23960/jemit.v1i1.4.

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This research is related to making a web to display data on CO, CO2 and temperature monitoring results in real time. The measuring instrument used consisted of an MQ-7 sensor to detect CO gas, a MQ-135 sensor to detect CO2 gas, a DHT-22 sensor to measure the temperature and a microcontroller as a control system. CO, CO2 and temperature measurements were carried out at the University of Lampung with 10 different points. Measurements were made for three days in the morning, afternoon and evening with the duration of measurement of each location 5 minutes. Measurement data is displayed on the PC server using an interface created through the Visual Basic 2010 program and saved to the Mysql database. Data from the database is sent to the web server. Based on the results of tests conducted, the web monitoring system is running well. The web can display CO, CO2 and temperature measurement data in the form of graphs and tables in real time. The web can be accessed by web browser at devices that are connected to the internet.

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Journal articles on the topic 'Gas temperature measurement'

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