Gotowe bibliografie tematyczne / Transit-time ultrasonic flowmeters

Gotowa bibliografia na temat „Transit-time ultrasonic flowmeters”

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Data publikacji: 25 maja 2024

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Artykuły w czasopismach na temat "Transit-time ultrasonic flowmeters"

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Tang, Jing Yuan, Jian Ming Chen, Hong Bin Ma i Guang Yu Tang. "Numerical Analysis of Flow Field Characteristics in Three-Z-Shaped Ultrasonic Flowmeter". Applied Mechanics and Materials 226-228 (listopad 2012): 1829–34. http://dx.doi.org/10.4028/www.scientific.net/amm.226-228.1829.

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The flow field characteristics in U-typed bend has been extensively studied for transit time ultrasonic flowmeters designing, but for the flowmeter with three-Z-shaped round pipe there is still lack of corresponding research. This paper presents a computational fluid dynamics (CFD) approach for modeling of the three-Z-shaped ultrasonic flowmeter and studying of internal fluid field characteristics based on Reynolds stress model (RSM). The fluid velocity profile in the three ultrasound path is obtained using CFD and secondary flow in cross section also is analyzed. The simulation results show that the internal flow fields in the flowmeter are not fully developed turbulence with asymmetric axial velocity distribution and dramatic changes along the flow direction, and there are obvious secondary cross flows on theirs cross-sections. The CFD simulations provide useful insights into the flow field associated with ultrasonic flowmeters design.
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Zhang, Hui, Chuwen Guo i Jie Lin. "Effects of Velocity Profiles on Measuring Accuracy of Transit-Time Ultrasonic Flowmeter". Applied Sciences 9, nr 8 (20.04.2019): 1648. http://dx.doi.org/10.3390/app9081648.

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Ultrasonic wave carries the information for flowing velocity when it is propagating in flowing fluids. Flowrate can be obtained by measuring the propagation time of ultrasonic wave. The principle of transit-time ultrasonic flowmeters used today was based on that the velocity is uniform along the propagation path of the ultrasonic wave. However, it is well known that the velocity profiles in a pipe are not uniform both in laminar flow and turbulent flow. Emphasis on the effects of velocity profiles across the pipe on the propagation time of ultrasonic wave, theoretical flowrate correction factors considering the real velocity profile were proposed for laminar and turbulent flow to obtain higher accuracy. Experiment data of ultrasonic flowmeter and weighting method are compared to verify the proposed theoretical correction factors. The average relative error of proposed correction factor is determined to be 0.976% for laminar flow and 0.25% for turbulent flow.
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Coulthard, J., i Y. Yan. "Ultrasonic Cross-Correlation Flowmeters". Measurement and Control 26, nr 6 (sierpień 1993): 164–67. http://dx.doi.org/10.1177/002029409302600601.

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Cross-correlation transit-time measuring instrumentation is now inherently accurate to a few ppm depending upon the sensing technology, but when ultrasonic sensors are used to measure fluid flow the accuracy is determined mainly by the fluid properties and flow profile. This paper describes the operation of the ultrasonic cross-correlation flowmeter and its performance in different applications.
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Ge, Liang, Hongxia Deng, Qing Wang, Ze Hu i Junlan Li. "Study of the influence of temperature on the measurement accuracy of transit-time ultrasonic flowmeters". Sensor Review 39, nr 2 (7.03.2019): 269–76. http://dx.doi.org/10.1108/sr-01-2018-0005.

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Purpose The purpose of this study is to deal largely with the influence of temperature variation on the measurement accuracy of transit-time ultrasonic flowmeter. Design/methodology/approach The causes of measurement error due to temperature are qualitatively and quantitatively analyzed, and a mathematical model is established. The experimental data are processed and analyzed, and the temperature compensation coefficient of flow measurement is obtained. Findings The experimental results show that the flow measurement results by temperature compensation are helpful in improving the measurement accuracy of the ultrasonic flowmeter. Practical implications This study has certain application value, which can provide theoretical support for the design of high-precision ultrasonic flowmeters and design guidance. Originality/value It is worth emphasizing that there are few research studies on the influence factors of temperature. This paper focuses on the influence of the temperature change on the flowmeter that is modeled, and the high precision flow parameter test system is designed based on the established model.
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Nguyen, Thi Huong Ly, i Suhyun Park. "Multi-Angle Liquid Flow Measurement Using Ultrasonic Linear Array Transducer". Sensors 20, nr 2 (10.01.2020): 388. http://dx.doi.org/10.3390/s20020388.

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Most ultrasonic flowmeters utilize several wedge sensors for transmission and reception. Thus, the location and alignment of the sensors are critical factors that determine the performance of the ultrasonic flowmeter. In this study, we proposed an ultrasound liquid flowmeter utilizing a 128-element linear array transducer with a transmit delay control for varying the incidence angles of ultrasound wave transmission. The performance of the flowmeter was evaluated at flow rates of 0–50 L/min in a specially designed pipe system. Flow estimation was performed with the transit-time method using cross-correlation with phase zero-crossing for sub-sample estimation. While a single plane wave approach performed invasive electromagnetic measurements with only 74% accuracy as a reference, a multiple angular compensation method with 24 angles was proposed to increase the accuracy of measurements up to 93%. This study demonstrated the capability of the non-invasive single-sided ultrasonic flowmeter with a linear array transducer for liquid flow measurements in the metal pipe system.
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Moore, Pamela I., Gregor J. Brown i Brian P. Stimpson. "Ultrasonic transit-time flowmeters modelled with theoretical velocity profiles: methodology". Measurement Science and Technology 11, nr 12 (20.11.2000): 1802–11. http://dx.doi.org/10.1088/0957-0233/11/12/321.

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Luca, Adrian, Regis Marchiano i Jean-Camille Chassaing. "Numerical Simulation of Transit-Time Ultrasonic Flowmeters by a Direct Approach". IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control 63, nr 6 (czerwiec 2016): 886–97. http://dx.doi.org/10.1109/tuffc.2016.2545714.

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Mousavi, Seyed Foad, Seyed Hassan Hashemabadi i Jalil Jamali. "New semi three-dimensional approach for simulation of Lamb wave clamp-on ultrasonic gas flowmeter". Sensor Review 40, nr 4 (19.06.2020): 465–76. http://dx.doi.org/10.1108/sr-08-2019-0203.

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Purpose The purpose of this study is to numerically simulate the Lamb wave propagation through a clamp-on ultrasonic gas flowmeter (UGF) in contact mode, using a new semi three-dimensional approach. Moreover, experimental and analytical modeling results for transit time difference method have been used to confirm the simulation results at different gas flow velocities from 0.3 to 2.4 m/s. Design/methodology/approach The new semi three-dimensional approach involves the simulation of the flow field of the gas in a three-dimensional model and subsequently the simulation of wave generation, propagation and reception in a two-dimensional (2D) model. Moreover, the analytical model assumes that the wave transitions occur in a 2D mode. Findings The new approach is a semi three-dimensional approach used in this work, has better accuracy than a complete 2D simulation while maintaining the computing time and costs approximately constant. It is faster and less expensive than a complete 3D simulation and more accurate than a complete 2D simulation. It was concluded that the new approach could be extended to simulate all types of ultrasonic gas and non-gas flowmeters, even under harsh conditions. Originality/value In this work, a new approach for the numerical simulation of all types of ultrasonic flowmeters is introduced. It was used for simulation of a Lamb wave ultrasonic flow meter in contact mode.
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Dadashnialehi, Amir, i Behzad Moshiri. "Online monitoring of transit-time ultrasonic flowmeters based on fusion of optical observation". Measurement 44, nr 6 (lipiec 2011): 1028–37. http://dx.doi.org/10.1016/j.measurement.2011.02.010.

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Heritage, J. E. "The performance of transit time ultrasonic flowmeters under good and disturbed flow conditions". Flow Measurement and Instrumentation 1, nr 1 (październik 1989): 24–30. http://dx.doi.org/10.1016/0955-5986(89)90006-x.

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Rozprawy doktorskie na temat "Transit-time ultrasonic flowmeters"

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Stewart, Mark A. "Development of the weight vector theory of transit-time ultrasonic flowmeters". Thesis, Cranfield University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320611.

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Duffell, Christopher James. "Application of optimization techniques to the design of ultrasonic transit-time flowmeters". Thesis, University of Strathclyde, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.405538.

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Luca, Adrian. "Simulation numérique de débitmètres à ultrasons par une méthode 'Galerkin discontinu'". Electronic Thesis or Diss., Paris 6, 2015. http://www.theses.fr/2015PA066753.

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Dans ce travail, l'accent est mis sur le développement d'un outil de simulation numérique pour la propagation des ondes dans des débitmètres à ultrason. La simulation d'un débitmètre à ultrason implique la propagation d'ondes acoustiques de haute fréquence sur de longues distances (supérieures à 100 longueurs d'onde) en présence de géométries complexes et de multiples interfaces entre solides et fluides en écoulement. Les phénomènes physiques présents dans ce type de configurations sont divers et peuvent avoir un effet important sur la justesse des mesures. En conséquence, contrairement aux approches utilisées jusqu'à présent (basées principalement sur des tracés des rayons), le modèle physique employé ici est basé sur la théorie des ondes. La propagation des ondes dans la partie fluide est décrite par les équations d'Euler linéarisées et dans la partie solide par les équations de l'élastodynamique linéaire. Suivant les interfaces fluide-solide, ces deux systèmes d'équations sont couplés via des conditions aux limites explicites. Pour minimiser la dissipation et la dispersion numérique qui peut apparaître dans ces configurations, le choix a été fait d'utiliser la méthode de Galerkin discontinue et le code de calcul est implémenté pour tourner sur des cartes graphiques. Le code de calcul a été validé numériquement et expérimentalement puis utilisé dans cinq études numériques qui examinent plusieurs sources d'erreurs souvent rencontrées en débitmètrie. Les résultats montrent que le choix du modèle physique, de la méthode numérique et l'accélération du code à l'aide des cartes graphiques conduisent à un outil très prometteur pour la simulation de débitmètres à ultrasons
In this work, the emphasis is on the development of a computational code for the numerical simulation of waves propagation in transit-time ultrasonic flowmeters. The simulation of an ultrasonic flowmeter is a challenging task. It implies the propagation of high frequency acoustic waves on long distances (greater than 100 wavelengths), through domains with complex geometries and multiples interfaces between solids and moving fluids. The physical phenomena occurring in this type of configurations are various and can have an important impact on the flow measurement accuracy. Therefore, unlike the approaches used until now (based mostly on the ray tracing model), the physical model used here is based on the wave theory. The wave propagation in the fluid part is described by the linearized Euler equations and in the solid part by the equations of linear elasticity. Along fluid-solid interfaces, these two systems of equations are coupled via explicit boundary conditions. In order to minimize the numerical dissipation and dispersion which may appear in these configurations, the numerical method used to solve the propagation problem is the nodal discontinuous Galerkin method. The code is implemented to run on graphical processing units (GPU). The computational code has been validated numerically and experimentally. Then, it is used in five numerical studies investigating several error sources often encountered in practical applications. The results show that by using a GPU-based discontinuous Galerkin method leads to a powerful tool for the simulation of complex configurations in the domain of ultrasonic flow measurement
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Hsueh, Cheng-Hung, i 薛政竑. "Analysis and Validation of Sound Fields for Transit-time Ultrasonic Flowmeters". Thesis, 2019. http://ndltd.ncl.edu.tw/handle/4nsdst.

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碩士
國立交通大學
機械工程系所
107
Ultrasonic flow meter is an important measuring instrument for process control. Geometric reflections of ultrasound in flows cannot explain some specific phenomena occurred in practical V-type installation for large-diameter pipes. For example, the received signal splits into two major tone-burst groups with a large number of small oscillations. This thesis presents a coordinated theoretical and experimental investigation of ultrasound propagation in the flows and surrounding pipe walls. The simulations include signal reconstruction based on generalized ray tracing and finite-element analysis of sound field in flows and pipes. The primary path of ultrasound traveling in the pipe consists of once forward and reflection over the pipe. The secondary path is composed of excess twice reflections across the walls of pipe. Ultrasound from both paths interfere such that signal splits into two groups for large-diameter polyvinylchloride (PVC) pipes. By contrast, the interference is not obvious in metal or pipes of small diameter. Simulated sound field using two-dimensional finite-element analysis indicates the transmitted plane waves are diverging into cylindrical waves if travel distance increases. Therefore, longer durations of small ringing are induced in received signal. Both results achieved by simulations and still water experiments are in very good agreement. The acoustic speed in the flow has a significant influence on the installation of clamp-on flow meter and determination of flow quantity. The cycle number of received signal beyond the threshold changes if the distance between transmitted and received transducers varies. The minimum indicates the best installation distance. This method has been validated to be true no matter what pipe materials and flows.
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Książki na temat "Transit-time ultrasonic flowmeters"

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Deng, Tong. Simulation study of an ultrasonic transit time flowmeter based on Golay codes. Manchester: UMIST, 1997.

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Części książek na temat "Transit-time ultrasonic flowmeters"

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Mei, Yanping, Chunling Zhang, Mingjun Zhang i Shen Wang. "Feature Wave Recognition-Based Signal Processing Method for Transit-Time Ultrasonic Flowmeter". W Lecture Notes in Electrical Engineering, 1018–27. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-6504-1_121.

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Zhou, Jiren, Chao Liu, Li Cheng, Yan Jin i Jieqiang Leng. "Application of Transit Time Ultrasonic Flowmeter for Low Lift Pumping Station Using". W Advances in Water Resources and Hydraulic Engineering, 1995–2002. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-89465-0_342.

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Streszczenia konferencji na temat "Transit-time ultrasonic flowmeters"

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Luca, Adrian, Kamel Fodil i Abdelmalik Zerarka. "Full-wave numerical simulation of ultrasonic transit-time gas flowmeters". W 2016 IEEE International Ultrasonics Symposium (IUS). IEEE, 2016. http://dx.doi.org/10.1109/ultsym.2016.7728757.

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Sun, Mingcheng, Tianpeng Wang, Shaoyang Xiao, Chunsheng Pan, Xiaohe Liang, Kai Gao i Wentao Zheng. "Numerical Simulation of Transit-time Ultrasonic Flowmeters in Deep-regulating Units". W 2019 IEEE International Conference on Power, Intelligent Computing and Systems (ICPICS). IEEE, 2019. http://dx.doi.org/10.1109/icpics47731.2019.8942481.

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Mahadeva, D. V., R. C. Baker i J. Woodhouse. "Studies of the Accuracy of Clamp-on Transit Time Ultrasonic Flowmeters". W 2008 IEEE Instrumentation and Measurement Technology Conference - I2MTC 2008. IEEE, 2008. http://dx.doi.org/10.1109/imtc.2008.4547177.

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Saldanha, Wanderson Eleuterio, i Edson da Costa Bortoni. "Development and signal processing of ultrasonic flowmeters based on transit time". W 2016 12th IEEE International Conference on Industry Applications (INDUSCON). IEEE, 2016. http://dx.doi.org/10.1109/induscon.2016.7874601.

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Marques da Silva, R. Pitanga, i A. Faro Orlando. "Metrological Considerations on Ultrasonic Flowmeters". W ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-38942.

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An ultrasonic flowmeter is a non-intrusive device that employs the transit time of an ultrasonic signal to measure gas and liquid flow rate. With no moving parts, they are extensively used to measure the flow rates of hydrocarbon gases in applications that require a wide range of pressure (e.g.: custody transfer of natural gas). But despite many technological advances, ultrasonic meters still need metrological assessment. Velocity profiles—fundamental to calculate flow rates—are constructed by making use of the well-known Gauss’ integration technique that depends, to a large extent, on a suitable choice of an orthogonal polynomial. The Gauss-Legendre’s quadrature is the most popular among manufacturers. In order to reduce uncertainties when the velocity profile has few points, the discretization error must be quantified. The paper presents simulations made with Gauss’ and Chebyshev’s quadratures for turbulent flow in smooth pipes and compares them with the theoretical profile. Some aspects of metrological reliability of ultrasonic meters are also discussed.
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Baumoel, Joseph. "Pipeline Management Using Networked Clamp-On Transit-Time Flowmeters". W 1996 1st International Pipeline Conference. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/ipc1996-1923.

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Traditionally, pipeline management has been accomplished using information derived from a variety of instrumentation, such as turbine meters, pressure and temperature sensors and densitometers and viscometers. This information has been delivered to tire operating staff via a SCADA system, feeding appropriate computation and display systems. However, there is a new pipeline management system deriving all its information from a single instrument, the clamp-on transit-time ultrasonic flowmeter. This system is capable of obtaining the same information as conventional systems, but in a more coordinated and optimized fashion. The clamp-on transit-time system has already proven to be remarkably effective in providing more timely data, and in a form extremely useful to the operating staff. Pipeline staff can view actual operating conditions quickly, and with more insight than is available from the traditional methods. This networked system, has now been made available as either an independent system, or one which is combined with its related Pipeline Leak Detection function.
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Hoffmann, Maik, Alexander Unger, Axel Jager i Mario Kupnik. "Effect of transducer port cavities in invasive ultrasonic transit-time gas flowmeters". W 2015 IEEE International Ultrasonics Symposium (IUS). IEEE, 2015. http://dx.doi.org/10.1109/ultsym.2015.0272.

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Luca, Adrian, Didier Boldo, Emmanuel Thibert i Eric Nanteau. "Benchmarking on the Accuracy of Multiple Clamp-On Transit-Time Ultrasonic Flowmeters". W 2021 IEEE International Ultrasonics Symposium (IUS). IEEE, 2021. http://dx.doi.org/10.1109/ius52206.2021.9593565.

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Gryshanova, Iryna. "The Improved Ultrasonic Flow Measuring Method". W ASME 2008 Fluids Engineering Division Summer Meeting collocated with the Heat Transfer, Energy Sustainability, and 3rd Energy Nanotechnology Conferences. ASMEDC, 2008. http://dx.doi.org/10.1115/fedsm2008-55225.

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The well-known transit time ultrasonic flow measuring method is based on determining of the difference in transit time of high frequency sound pulses that are transmitted along and against the flow stream. Having this information, the flowmeter can calculate average flow velocity and then the flowrate. The principle of measurement is simple but determining the true average velocity is difficult, especially to obtain custody transfer measurement accuracy in one-path ultrasonic flowmeters. This paper proposes an improvement of the mentioned flow measuring method. For this purpose it is not necessary to use extra devices complicating a design and causing additional pressure drop. The object in view is achieved by entering necessary correction during flowrate calculation. For that the stage-by-stage estimation of the flow profile correction factor, which considers a difference between average velocity along the sound path and average velocity for pipe cross-section is carried out depending on the flow regime. Correction is based on the offered original processing algorithm which in turn relies on the mathematical model of ultrasonic flowmeter, considering except for velocity distribution profile also influence of a pipeline wall roughness. Thus, even having only one pair of piezoelectric transducers, the improved method allows to increase an accuracy of flow measurement in the wide range covering laminar, transitive and turbulent flow modes.
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Luca, Adrian, Regis Marchiano i Jean-Camille Chassaing. "A discontinuous galerkin approach for the numerical simulation of transit-time ultrasonic flowmeters". W 2014 IEEE International Ultrasonics Symposium (IUS). IEEE, 2014. http://dx.doi.org/10.1109/ultsym.2014.0229.

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