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Journal articles on the topic 'Aerospace gas turbines'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

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1

Asgari, Hamid, Mohsen Fathi Jegarkandi, XiaoQi Chen, and Raazesh Sainudiin. "Design of conventional and neural network based controllers for a single-shaft gas turbine." Aircraft Engineering and Aerospace Technology 89, no. 1 (2017): 52–65. http://dx.doi.org/10.1108/aeat-11-2014-0187.

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Purpose The purpose of this paper is to develop and compare conventional and neural network-based controllers for gas turbines. Design/methodology/approach Design of two different controllers is considered. These controllers consist of a NARMA-L2 which is an artificial neural network-based nonlinear autoregressive moving average (NARMA) controller with feedback linearization, and a conventional proportional-integrator-derivative (PID) controller for a low-power aero gas turbine. They are briefly described and their parameters are adjusted and tuned in Simulink-MATLAB environment according to t

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2

Brady, C. O., and D. L. Luck. "The Increased Use of Gas Turbines as Commercial Marine Engines." Journal of Engineering for Gas Turbines and Power 116, no. 2 (1994): 428–33. http://dx.doi.org/10.1115/1.2906839.

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Over the last three decades, aeroderivative gas turbines have become established naval ship propulsion engines, but use in the commercial marine field has been more limited. Today, aeroderivative gas turbines are being increasingly utilized as commercial marine engines. The primary reason for the increased use of gas turbines is discussed and several recent GE aeroderivative gas turbine commercial marine applications are described with particular aspects of the gas turbine engine installations detailed. Finally, the potential for future commercial marine aeroderivative gas turbine applications

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3

Fersini, Maurizio, R. Bianco, L. De Lorenzis, Antonio Licciulli, G. Pasquero, and G. Zanon. "Thermo-Structural Analysis of Ceramic Vanes for Gas Turbines." Advances in Science and Technology 45 (October 2006): 1759–64. http://dx.doi.org/10.4028/www.scientific.net/ast.45.1759.

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Advanced structural ceramics such as Hot Pressed Silicon Nitride (HPSN) and Reaction Bonded Silicon Carbide (RBSC), thanks to their low density (3.1 ÷ 3.4 gr/cm3) and to their thermostructural properties, are interesting candidates for aerospace applications. This research investigates the feasibility of employing such monolithic advanced ceramics for the production of turbine vanes for aerospace applications, by means of a finite element analysis. A parametric study is performed to analyse the influence of the coefficient of thermal expansion, the specific heat, the thermal conductivity, and

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4

Bhargava, R., M. Bianchi, A. Peretto, and P. R. Spina. "A Feasibility Study of Existing Gas Turbines for Recuperated, Intercooled, and Reheat Cycle." Journal of Engineering for Gas Turbines and Power 126, no. 3 (2004): 531–44. http://dx.doi.org/10.1115/1.1707033.

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In the present paper, a comprehensive and simple in application design methodology to obtain a gas turbine working on recuperated, intercooled, and reheat cycle utilizing existing gas turbines is presented. Applications of the proposed design steps have been implemented on the three existing gas turbines with wide ranging design complexities. The results of evaluated aerothermodynamic performance for these existing gas turbines with the proposed modifications are presented and compared in this paper. Sample calculations of the analysis procedures discussed, including stage-by-stage analysis of

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5

Fatsis, Antonios. "Performance Enhancement of One and Two-Shaft Industrial Turboshaft Engines Topped With Wave Rotors." International Journal of Turbo & Jet-Engines 35, no. 2 (2018): 137–47. http://dx.doi.org/10.1515/tjj-2016-0040.

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Abstract Wave rotors are rotating equipment designed to exchange energy between high and low enthalpy fluids by means of unsteady pressure waves. In turbomachinery, they can be used as topping devices to gas turbines aiming to improve performance. The integration of a wave rotor into a ground power unit is far more attractive than into an aeronautical application, since it is not accompanied by any inconvenience concerning the over-weight and extra dimensioning. Two are the most common types of ground industrial gas turbines: The one-shaft and the two-shaft engines. Cycle analysis for both typ

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Bander, F. "Multifuel Gas Turbine Propulsion for Naval Ships: Gas Turbine Cycles Implementing a Rotating Gasifier." Journal of Engineering for Gas Turbines and Power 107, no. 3 (1985): 758–68. http://dx.doi.org/10.1115/1.3239798.

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The purpose of this paper is to investigate the possibilities of implementing a rotating gasifier to convert aero-derived gas turbines into multifuel ship propulsion units, thereby combining the advantages of lightweight and compact gas turbines with the multifuel characteristics of a rotating gasifier. Problems (and possible solutions) to be discussed are: (i) aerodynamic interaction between gas turbine and gasifier; (ii) attaining maximum energy productivity together with ease of control; (iii) corrosion and/or erosion of gas turbine components.

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7

Hung, W. S. Y. "Carbon Monoxide Emissions From Gas Turbines as Influenced by Ambient Temperature and Turbine Load." Journal of Engineering for Gas Turbines and Power 115, no. 3 (1993): 588–93. http://dx.doi.org/10.1115/1.2906747.

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The emissions of carbon monoxide (CO) from gas turbines are typically below 100 ppmvd at 15 percent O2 at design full-load operating conditions. The use of water/ steam to reduce NOx emissions from gas turbines results in an increase in CO emissions from gas turbines. This is particularly true when increased rates of water/ steam injection are used to meet stringent NOx limits. Regulations limiting CO emissions from stationary gas turbines were first initiated in the late 1980s by the Federal Republic of Germany and the state of New Jersey in the United States. Since these regulations are sile

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8

Bianchi, M., G. Negri di Montenegro, A. Peretto, and P. R. Spina. "A Feasibility Study of Inverted Brayton Cycle for Gas Turbine Repowering." Journal of Engineering for Gas Turbines and Power 127, no. 3 (2005): 599–605. http://dx.doi.org/10.1115/1.1765121.

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In the paper a feasibility study of inverted Brayton cycle (IBC) engines, for the repowering of existing gas turbines, is presented. The following main phases have been carried out: (i) identification of the more suitable gas turbines to be repowered by means of an IBC engine; (ii) designing of the IBC components. Once the IBC engines for the candidate gas turbines were designed, an analysis has been developed to check the possibility to match these engines with other gas turbines, similar to those for which the IBC engines have been designed. In all the analyzed cases the evaluated performanc

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9

Bogomolov, E. N., and P. V. Kashcheeva. "Thermodynamic features of aircraft diagonal gas turbines." Russian Aeronautics (Iz VUZ) 52, no. 2 (2009): 250–54. http://dx.doi.org/10.3103/s1068799809020196.

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10

El Hadik, A. A. "The Impact of Atmospheric Conditions on Gas Turbine Performance." Journal of Engineering for Gas Turbines and Power 112, no. 4 (1990): 590–96. http://dx.doi.org/10.1115/1.2906210.

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In a hot summer climate, as in Kuwait and other Arabian Gulf countries, the performance of a gas turbine deteriorates drastically during the high-temperature hours (up to 60°C in Kuwait). Power demand is the highest at these times. This necessitates an increase in installed gas turbine capacities to balance this deterioration. Gas turbines users are becoming aware of this problem as they depend more on gas turbines to satisfy their power needs and process heat for desalination due to the recent technical and economical development of gas turbines. This paper is devoted to studying the impact o

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11

Bhargava, R., and C. B. Meher-Homji. "Parametric Analysis of Existing Gas Turbines With Inlet Evaporative and Overspray Fogging." Journal of Engineering for Gas Turbines and Power 127, no. 1 (2005): 145–58. http://dx.doi.org/10.1115/1.1712980.

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With deregulation in the power generation market and a need for flexibility in terms of power augmentation during the periods of high electricity demand, power plant operators all over the world are exploring means to augment power from both the existing and new gas turbines. An approach becoming increasingly popular is that of the high pressure inlet fogging. In this paper, the results of a comprehensive parametric analysis on the effects of inlet fogging on a wide range of existing gas turbines are presented. Both evaporative and overspray fogging conditions have been analyzed. The results s

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12

Bogdanov, V. I. "Concepts of Gas Turbine Engine Improvement Through the Use of Choked-Flow Turbines." Russian Aeronautics 61, no. 2 (2018): 244–51. http://dx.doi.org/10.3103/s1068799818020137.

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13

Larson, E. D., and R. H. Williams. "Biomass-Gasifier Steam-Injected Gas Turbine Cogeneration." Journal of Engineering for Gas Turbines and Power 112, no. 2 (1990): 157–63. http://dx.doi.org/10.1115/1.2906155.

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Steam injection for power and efficiency augmentation in aeroderivative gas turbines is now commercially established for natural gas-fired cogeneration. Steam-injected gas turbines fired with coal and biomass are being developed. In terms of efficiency, capital cost, and commercial viability, the most promising way to fuel steam-injected gas turbines with biomass is via the biomass-integrated gasifier/steam-injected gas turbine (BIG/STIG). The R&D effort required to commercialize the BIG/STIG is modest because it can build on extensive previous coal-integrated gasifier/gas turbine developm

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14

Cooke, D. H., and W. D. Parizot. "Cogenerative, Direct Exhaust Integration of Gas Turbines in Ethylene Production." Journal of Engineering for Gas Turbines and Power 113, no. 2 (1991): 212–20. http://dx.doi.org/10.1115/1.2906547.

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Within the past few years, gas turbines have been integrated into several new world-class ethylene production plants, for the first time using the exhaust as a source of preheated combustible oxygen for the cracking furnaces. The economic inducements and technical impact of such integration on the process are discussed. The general ethylene cracking and recovery process is described, and the various ways of integrating gas turbines are compared, culminating in the current leading designs. Means of providing ambient air backup to protect furnace operation from gas turbine trips are discussed. F

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15

Bruce, C. J., and R. A. Cartwright. "Marine Gas Turbine Evaluation and Research at the Admiralty Test House, RAE Pyestock." Journal of Engineering for Gas Turbines and Power 114, no. 2 (1992): 169–73. http://dx.doi.org/10.1115/1.2906566.

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The Admiralty Test House (ATH) at the Royal Aerospace Establishment Pyestock has provided test bed facilities for evaluation of marine gas turbines and ancillary equipments for Royal Naval use since 1952. While the ATH is presently undergoing an extensive refurbishment program in preparation for trials of the Rolls-Royce 20MW Spey SM1C, research continues on a number of innovative gas turbine condition monitoring techniques. This paper presents a brief history of the Marine Gas Turbine Section and describes the facilities of the ATH following major refurbishment. The capabilities of the steady

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16

Becker, B., and B. Schetter. "Gas Turbines Above 150 MW for Integrated Coal Gasification Combined Cycles (IGCC)." Journal of Engineering for Gas Turbines and Power 114, no. 4 (1992): 660–64. http://dx.doi.org/10.1115/1.2906639.

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Commercial IGCC power plants need gas turbines with high efficiency and high power output in order to reduce specific installation costs and fuel consumption. Therefore the well-proven 154 MW V94.2 and the new 211 MW V94.3 high-temperature gas turbines are well suited for this kind of application. A high degree of integration of the gas turbine, steam turbine, oxygen production, gasifier, and raw gas heat recovery improves the cycle efficiency. The air use for oxygen production is taken from the gas turbine compressor. The N2 fraction is recompressed and mixed with the cleaned gas prior to com

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17

Parks, W. P., R. R. Ramey, D. C. Rawlins, J. R. Price, and M. Van Roode. "Potential Applications of Structural Ceramic Composites in Gas Turbines." Journal of Engineering for Gas Turbines and Power 113, no. 4 (1991): 628–34. http://dx.doi.org/10.1115/1.2906287.

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A Babcock and Wilcox-Solar Turbines Team has completed a program to assess the potential for structural ceramic composites in turbines for direct coal-fired or coal gasification environments. A review is made of the existing processes in direct coal firing, pressurized fluid bed combustors, and coal gasification combined cycle systems. Material requirements in these areas were also discussed. The program examined state-of-the-art ceramic composite materials. Utilization of ceramic composites in the turbine rotor blades and nozzle vanes would provide the most benefit. A research program designe

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18

Hoshino, A., T. Sugimoto, T. Tatsumi, and Y. Nakagawa. "Development of a 30PS Class Small Gas Turbine and Its Power-Up Version." Journal of Engineering for Gas Turbines and Power 111, no. 2 (1989): 225–31. http://dx.doi.org/10.1115/1.3240240.

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Due to the recent popularity of small and medium-sized industrial gas turbines in many fields, gas turbines below 100 SHP have been employed as prime movers, a power range traditionally reserved for diesel and gasoline engines. Generally speaking, however, small gas turbines have many design difficulties in thermal efficiency, high rotational speed, compact auxiliary equipment, etc., derived from limitations of their dimensions. Small gas turbines S5A-01 and S5B-01, which have 32 PS output power at standard conditions, have been developed and are being produced. Presently, a 30 percent growth

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19

Rodgers, C. "Impingement Starting and Power Boosting of Small Gas Turbines." Journal of Engineering for Gas Turbines and Power 107, no. 4 (1985): 821–27. http://dx.doi.org/10.1115/1.3239817.

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The technology of high-pressure air or hot-gas impingement from stationary shroud supplementary nozzles onto radial outflow compressors and radial inflow turbines to permit rapid gas turbine starting or power boosting is discussed. Data are presented on the equivalent turbine component performance for convergent/divergent shroud impingement nozzles, which reveal the sensitivity of nozzle velocity coefficient with Mach number and turbine efficiency with impingement nozzle admission arc. Compressor and turbine matching is addressed in the transient turbine start mode with the possibility of oper

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20

Liao, Zengbu, Jian Wang, Jinxin Liu, et al. "Uncertainties in gas-path diagnosis of gas turbines: Representation and impact analysis." Aerospace Science and Technology 113 (June 2021): 106724. http://dx.doi.org/10.1016/j.ast.2021.106724.

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21

Kyprianidis, K. G., V. Sethi, S. O. T. Ogaji, P. Pilidis, R. Singh, and A. I. Kalfas. "Uncertainty in gas turbine thermo-fluid modelling and its impact on performance calculations and emissions predictions at aircraft system level." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 226, no. 2 (2011): 163–81. http://dx.doi.org/10.1177/0954410011406664.

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In this article, various aspects of thermo-fluid modelling for gas turbines are described and the impact on performance calculations and emissions predictions at aircraft system level is assessed. Accurate and reliable fluid modelling is essential for any gas turbine performance simulation software as it provides a robust foundation for building advanced multi-disciplinary modelling capabilities. Caloric properties for generic and semi-generic gas turbine performance simulation codes can be calculated at various levels of fidelity; selection of the fidelity level is dependent upon the objectiv

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22

Fukuizumi, Y., J. Masada, V. Kallianpur, and Y. Iwasaki. "Application of “H Gas Turbine” Design Technology to Increase Thermal Efficiency and Output Capability of the Mitsubishi M701G2 Gas Turbine." Journal of Engineering for Gas Turbines and Power 127, no. 2 (2005): 369–74. http://dx.doi.org/10.1115/1.1850490.

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Mitsubishi completed design development and verification load testing of a steam-cooled M501H gas turbine at a combined cycle power plant at Takasago, Japan in 2001. Several advanced technologies were specifically developed in addition to the steam-cooled components consisting of the combustor, turbine blades, vanes, and the rotor. Some of the other key technologies consisted of an advanced compressor with a pressure ratio of 25:1, active clearance control, and advanced seal technology. Prior to the M501H, Mitsubishi introduced cooling-steam in “G series” gas turbines in 1997 to cool combustor

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23

Khalid, A. H., K. Kontis, and H.-Z. Behtash. "Phosphor thermometry in gas turbines: Consideration factors." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 224, no. 7 (2010): 745–55. http://dx.doi.org/10.1243/09544100jaero560.

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24

Rice, I. G. "Thermodynamic Evaluation of Gas Turbine Cogeneration Cycles: Part I—Heat Balance Method Analysis." Journal of Engineering for Gas Turbines and Power 109, no. 1 (1987): 1–7. http://dx.doi.org/10.1115/1.3240001.

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This paper presents a heat balance method of evaluating various open-cycle gas turbines and heat recovery systems based on the first law of thermodynamics. A useful graphic solution is presented that can be readily applied to various gas turbine cogeneration configurations. An analysis of seven commercially available gas turbines is made showing the effect of pressure ratio, exhaust temperature, intercooling, regeneration, and turbine rotor inlet temperature in regard to power output, heat recovery, and overall cycle efficiency. The method presented can be readily programmed in a computer, for

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25

Rice, I. G. "Split Stream Boilers for High-Temperature/High-Pressure Topping Steam Turbine Combined Cycles." Journal of Engineering for Gas Turbines and Power 119, no. 2 (1997): 385–94. http://dx.doi.org/10.1115/1.2815586.

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Research and development work on high-temperature and high-pressure (up to 1500°F TIT and 4500 psia) topping steam turbines and associated steam generators for steam power plants as well as combined cycle plants is being carried forward by DOE, EPRI, and independent companies. Aeroderivative gas turbines and heavy-duty gas turbines both will require exhaust gas supplementary firing to achieve high throttle temperatures. This paper presents an analysis and examples of a split stream boiler arrangement for high-temperature and high-pressure topping steam turbine combined cycles. A portion of the

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26

Staub, F. W., S. G. Kimura, C. L. Spiro, and M. W. Horner. "Coal–Water Slurry Combustion in Gas Turbines." Journal of Engineering for Gas Turbines and Power 111, no. 1 (1989): 1–7. http://dx.doi.org/10.1115/1.3240222.

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This paper presents preliminary results of a program to investigate the key technologies for burning coal-water slurries in gas turbines. Results are given for slurry atomization and combustion testing and analyses performed at conditions typical for gas turbine applications. Significant progress has been made toward the understanding of slurry combustion and ash deposition phenomena. Confidence has been gained to the extent where elimination of a supplementary pilot fuel can now be projected.

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De Lucia, M., and G. Masotti. "A Scanning Radiation Thermometry Technique for Determining Temperature Distribution in Gas Turbines." Journal of Engineering for Gas Turbines and Power 117, no. 2 (1995): 341–46. http://dx.doi.org/10.1115/1.2814100.

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A scanning radiation thermometry technique for determining temperature distributions in gas turbines is presented. The system, an enhancement of an earlier work, can be used by operators even without special training, since the temperature distribution is measured and corrected in terms of the error due to the reflected radiation only on the basis of the turbine’s known geometry and the physical properties of the materials. In the proposed model, the surface-exitent radiances are directly acquired via 360-deg scans. Experimental testing was performed on a static turbine-blading model. Since th

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Meier, J. G., W. S. Y. Hung, and V. M. Sood. "Development and Application of Industrial Gas Turbines for Medium-Btu Gaseous Fuels." Journal of Engineering for Gas Turbines and Power 108, no. 1 (1986): 182–90. http://dx.doi.org/10.1115/1.3239869.

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This paper describes the successful development and application of industrial gas turbines using medium-Btu gaseous fuels, including those derived from biodegradation of organic matters found in sanitary landfills and liquid sewage. The effects on the gas turbine and its combustion system of burning these alternate fuels compared to burning high-Btu fuels, along with the gas turbine development required to use alternate fuels from the point of view of combustion process, control system, gas turbine durability, maintainability and safety, are discussed.

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Bakken, L. E., and L. Skogly. "Parametric Modeling of Exhaust Gas Emission From Natural Gas Fired Gas Turbines." Journal of Engineering for Gas Turbines and Power 118, no. 3 (1996): 553–60. http://dx.doi.org/10.1115/1.2816683.

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Increased focus on air pollution from gas turbines in the Norwegian sector of the North Sea has resulted in taxes on CO2. Statements made by the Norwegian authorities imply regulations and/or taxes on NOx emissions in the near future. The existing CO2 tax of NOK 0.82/Sm3 (US Dollars 0.12/Sm3) and possible future tax on NOx are analyzed mainly with respect to operating and maintenance costs for the gas turbine. Depending on actual tax levels, the machine should be operated on full load/optimum thermal efficiency or part load to reduce specific exhaust emissions. Based on field measurements, exh

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Martinez-Frias, Joel, Salvador M. Aceves, J. Ray Smith, and Harry Brandt. "Thermodynamic Analysis of Zero-Atmospheric Emissions Power Plant." Journal of Engineering for Gas Turbines and Power 126, no. 1 (2004): 2–8. http://dx.doi.org/10.1115/1.1635399.

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This paper presents a theoretical thermodynamic analysis of a zero-atmospheric emissions power plant. In this power plant, methane is combusted with oxygen in a gas generator to produce the working fluid for the turbines. The combustion produces a gas mixture composed of steam and carbon dioxide. These gases drive multiple turbines to produce electricity. The turbine discharge gases pass to a condenser where water is captured. A stream of pure carbon dioxide then results that can be used for enhanced oil recovery or for sequestration. The analysis considers a complete power plant layout, inclu

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31

Simonich, J. C. "Actuator technologies for active noise control in gas turbines." Journal of Aircraft 33, no. 6 (1996): 1174–80. http://dx.doi.org/10.2514/3.47072.

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Sulzer, Sabin, Magnus Hasselqvist, Hideyuki Murakami, Paul Bagot, Michael Moody, and Roger Reed. "The Effects of Chemistry Variations in New Nickel-Based Superalloys for Industrial Gas Turbine Applications." Metallurgical and Materials Transactions A 51, no. 9 (2020): 4902–21. http://dx.doi.org/10.1007/s11661-020-05845-7.

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Abstract Industrial gas turbines (IGT) require novel single-crystal superalloys with demonstrably superior corrosion resistance to those used for aerospace applications and thus higher Cr contents. Multi-scale modeling approaches are aiding in the design of new alloy grades; however, the CALPHAD databases on which these rely remain unproven in this composition regime. A set of trial nickel-based superalloys for IGT blades is investigated, with carefully designed chemistries which isolate the influence of individual additions. Results from an extensive experimental characterization campaign are

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Johnson, M. S. "Prediction of Gas Turbine On- and Off-Design Performance When Firing Coal-Derived Syngas." Journal of Engineering for Gas Turbines and Power 114, no. 2 (1992): 380–85. http://dx.doi.org/10.1115/1.2906602.

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This paper describes a procedure used to model the performance of gas turbines designed to fire natural gas (or distillate oil) when fired on medium-Btu fuel, such as coal-derived syngas. Results from such performance studies can be used in the design or analysis of Gasification Combined Cycle (GCC) power plants. The primary difficulty when firing syngas in a gas turbine designed for natural gas is the tendency to drive the compressor toward surge. If the gas turbine has sufficient surge margin and mechanical durability, Gas Turbine Evaluation code (GATE) simulations indicate that net output p

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Wenglarz, R. A. "An Approach for Evaluation of Gas Turbine Deposition." Journal of Engineering for Gas Turbines and Power 114, no. 2 (1992): 230–34. http://dx.doi.org/10.1115/1.2906577.

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An approach for estimating deposition in gas turbines is described. This approach extrapolates deposition data from lower cost experiments than turbine engine or cascade tests. The purpose is a method to screen candidate fuels and turbine protection methods so that only the most promising need be evaluated in turbine tests. The deposition approach is applied to estimate deposition maintenance intervals for a tested fuel, evaluate benefits of hot gas cleanup, and provide fuel screening criteria.

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Takeya, K., and H. Yasui. "Performance of the Integrated Gas and Steam Cycle (IGSC) for Reheat Gas Turbines." Journal of Engineering for Gas Turbines and Power 110, no. 2 (1988): 220–24. http://dx.doi.org/10.1115/1.3240107.

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In 1978, the Japanese government started a national project for energy conservation called the Moonlight Project. The Engineering Research Association for Advanced Gas Turbines was selected to research and develop an advanced gas turbine for this project. The development stages were planned as follows: first, the development of a reheat gas turbine for a pilot plant (AGTJ-100A), and second, a prototype plant (AGTJ-100B). The AGTJ-100A has been undergoing performance tests since 1984 at the Sodegaura Power Station of the Tokyo Electric Power Co., Inc. (TEPCO). The inlet gas temperature of the h

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Wang, Guoliang, Ning Ge, and Dongdong Zhong. "Numerical Investigation of the Wake Vortex-Related Flow Mechanisms in Transonic Turbines." International Journal of Aerospace Engineering 2020 (August 1, 2020): 1–18. http://dx.doi.org/10.1155/2020/8825542.

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As the core equipment of the power generation system, a gas turbine is an indispensable energy-converting device in the national industry. The flow inside a high-pressure turbine (HPT) is highly unsteady, which has a great influence on the aerothermal performance and structural strength. To better clarify the flow mechanism and guide the advanced design, the basic flow characteristics of transonic turbines are investigated in the paper by a modified scale-adaptive simulation (SAS) model based on the shear stress transport (SST) turbulence model. The numerical results reveal the formation and d

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Yang, Dongfang, Vladimir Pankov, Linruo Zhao, and Prakash Patnaik. "Laser deposited high temperature thin film sensors for gas turbines." Aircraft Engineering and Aerospace Technology 92, no. 1 (2020): 2–7. http://dx.doi.org/10.1108/aeat-11-2018-0292.

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Purpose Accurate measurements of the temperature distributions in hot section components are indispensable for the prognostic and health management of gas turbines. Thin film thermocouple (TFTC) sensors, directly fabricated on the surface of a component, add negligible mass and create little or no disturbance to airflow, and therefore, can provide accurate measurements of fast temperature fluctuations of gas turbines. The purpose of this paper is to evaluate TFTC sensors fabricated by combining pulsed laser deposition (PLD) and micromachining techniques (LM). Design/methodology/approach The “d

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Uppal, Tarun, Soumyendu Raha, and Suresh Srivastava. "Inverse Simulation for Gas Turbine Engine Control through Differential Algebraic Inequality Formulation." International Journal of Turbo & Jet-Engines 35, no. 4 (2018): 373–83. http://dx.doi.org/10.1515/tjj-2016-0057.

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Abstract Modern day gas turbines are prime movers in land, air and sea. They have stringent performance requirements to meet the complex mission objectives. Optimal control strategies can help them meet their performance objectives more efficiently. A novel inverse simulation method for optimal control and system analysis studies using Differential Algebraic Equality/Inequality (DAE/DAI) technique is brought out in this paper with a case study. The gas turbine model together with safety constraints and performance specifications is represented as a high index DAI/DAE system. The solution for t

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Rocca, E., P. Steinmetz, and M. Moliere. "Revisiting the Inhibition of Vanadium-Induced Hot Corrosion in Gas Turbines." Journal of Engineering for Gas Turbines and Power 125, no. 3 (2003): 664–69. http://dx.doi.org/10.1115/1.1456095.

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Since the 1970s, nothing substantially new has been published in the gas turbine community about the hot corrosion by vanadium and its inhibition, after the “inhibition orthodoxy” based on the formation of magnesium vanadate, was established. However, the experience acquired since the late 1980s with heavy-duty gas turbines burning ash-forming fuels in southern China, shows that the combustion of very contaminated fuels does not entail corrosion nor abundant ash-deposit on gas turbines buckets. Analyses of deposits collected from gas turbines fired with these crude oils showed that the ash-dep

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Grondahl, C. M., and M. E. Guiler. "MS3002 Advanced Tech Upgrade Application and Operating Experience." Journal of Engineering for Gas Turbines and Power 113, no. 4 (1991): 495–500. http://dx.doi.org/10.1115/1.2906267.

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Modernization of MS3002 gas turbines produced by GE from 1951 to 1973 has been accomplished with the application of advanced technology components in a redesigned turbine hot section. Texas Eastern installed the first modernization package in 1986 and now has 10 units in service totalling more than 135,000 operating hours. This paper presents the user’s motivation to refurbish 30-year-old gas turbines, including details of the uprate installation and subsequent operating experience. Specifics of the advanced technology components in these units are provided including their impact on unit perfo

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Valenti, Michael. "Turbines for Peace." Mechanical Engineering 122, no. 08 (2000): 70–72. http://dx.doi.org/10.1115/1.2000-aug-5.

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This article discusses that military-sponsored research tools can improve the machines that drive civil applications. The Defense Evaluation and Research Agency (DERA) researchers tested the engine of the legendary DeHavilland Vampire single seat jet fighter in the late 1940s. This Vampire is owned by Fred Ihlenburg, president of Yakity Yaks Inc., an importer of foreign military aircraft, based in Aurora, Oregon. DERA is investigating heat transfer on turbine blades to help gas turbine manufacturers develop a cooling system that will keep blades at an optimum temperature while minimizing losse

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Beck, D. S. "Optimization of Regenerated Gas Turbines." Journal of Engineering for Gas Turbines and Power 118, no. 3 (1996): 654–60. http://dx.doi.org/10.1115/1.2816698.

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An algorithm for the optimization of regenerated gas turbines is given. For sets of inputs that are typical for automotive applications, the optimum cycle pressure ratio and a set of optimized regenerator parameters that maximize thermal efficiency are given. A second algorithm, an algorithm for sizing regenerators based on outputs of the optimization algorithm, is given. With this sizing algorithm, unique regenerator designs can be determined for many applications based on the presented optimization data. Results of example sizings are given. The data indicate that one core (instead of two co

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Alozie, O., Y. G. Li, M. Diakostefanis, X. Wu, X. Shong, and W. Ren. "Assessment of degradation equivalent operating time for aircraft gas turbine engines." Aeronautical Journal 124, no. 1274 (2020): 549–80. http://dx.doi.org/10.1017/aer.2019.153.

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ABSTRACTThis paper presents a novel method for quantifying the effect of ambient, environmental and operating conditions on the progression of degradation in aircraft gas turbines based on the measured engine and environmental parameters. The proposed equivalent operating time (EOT) model considers the degradation modes of fouling, erosion, and blade-tip wear due to creep strain, and expresses the actual degradation rate over the engine clock time relative to a pre-defined reference condition. In this work, the effects of changing environmental and engine operating conditions on the EOT for th

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Brun, Klaus, Rainer Kurz, and Harold R. Simmons. "Aerodynamic Instability and Life-Limiting Effects of Inlet and Interstage Water Injection Into Gas Turbines." Journal of Engineering for Gas Turbines and Power 128, no. 3 (2004): 617–25. http://dx.doi.org/10.1115/1.2135819.

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Gas turbine power enhancement technologies, such as inlet fogging, interstage water injection, saturation cooling, inlet chillers, and combustor injection, are being employed by end users without evaluating the potentially negative effects these devices may have on the operational integrity of the gas turbine. Particularly, the effect of these add-on devices, off-design operating conditions, nonstandard fuels, and compressor degradation∕fouling on the gas turbine’s axial compressor surge margin and aerodynamic stability is often overlooked. Nonetheless, compressor aerodynamic instabilities cau

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Jansen, M., T. Schulenberg, and D. Waldinger. "Shop Test Result of the V64.3 Gas Turbine." Journal of Engineering for Gas Turbines and Power 114, no. 4 (1992): 676–81. http://dx.doi.org/10.1115/1.2906641.

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The V64.3 60-MW combustion turbine is the first of a new generation of high-temperature gas turbines, designed for 50 and 60 Hz simple cycle, combined cycle, and cogeneration applications. The prototype engine was tested in 1990 in the Berlin factories under the full range of operation conditions. It was equipped with various measurement systems to monitor pressures, gas and metal temperatures, clearances, strains, vibrations, and exhaust emissions. The paper describes the engine design, the test facility and instrumentation, and the engine performance. Results are given for turbine blade temp

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Cunha, F. J., and M. K. Chyu. "Trailing-Edge Cooling for Gas Turbines." Journal of Propulsion and Power 22, no. 2 (2006): 286–300. http://dx.doi.org/10.2514/1.20898.

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Reed, John A., and Abdollah A. Afjeh. "Computational Simulation of Gas Turbines: Part 1—Foundations of Component-Based Models." Journal of Engineering for Gas Turbines and Power 122, no. 3 (2000): 366–76. http://dx.doi.org/10.1115/1.1287490.

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Designing and developing new aerospace propulsion systems is time-consuming and expensive. Computational simulation is a promising means for alleviating this cost, but requires a flexible software simulation system capable of integrating advanced multidisciplinary and multifidelity analysis methods, dynamically constructing arbitrary simulation models, and distributing computationally complex tasks. To address these issues, we have developed Onyx, a Java-based object-oriented domain framework for aerospace propulsion system simulation. This paper presents the design of a common engineering mod

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Ito, K., R. Yokoyama, and Y. Matsumoto. "Optimal Operation of Cogeneration Plants With Steam-Injected Gas Turbines." Journal of Engineering for Gas Turbines and Power 117, no. 1 (1995): 60–66. http://dx.doi.org/10.1115/1.2812782.

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The effect of introducing steam-injected gas turbines into cogeneration plants is investigated from economical and energy-saving aspects on the basis of a mathematical programming approach. An optimal planning method is first presented by which the operational strategy is assessed so as to minimize the hourly running cost. Then, a case study is carried out on a plant used for district heating and cooling. Through the study, it is ascertained that the proposed method is a useful tool for the operational planning of steam-injected gas turbine plants, and that these plants can be attractive from

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Schlottke, Adrian, and Bernhard Weigand. "Two-Phase Flow Phenomena in Gas Turbine Compressors with a Focus on Experimental Investigation of Trailing Edge Disintegration." Aerospace 8, no. 4 (2021): 91. http://dx.doi.org/10.3390/aerospace8040091.

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Two-phase flow in gas turbine compressors occurs, for example, at heavy rain flight condition or at high-fogging in stationary gas turbines. The liquid dynamic processes are independent of the application. An overview on the processes and their approach in literature is given. The focus of this study lies on the experimental investigation of the trailing edge disintegration. In the experiments, shadowgraphy is used to observe the disintegration of a single liquid rivulet with constant liquid mass flow rate at the edge of a thin plate at different air flow velocities. A two side view enables ca

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Smith, A. R., J. Klosek, and D. W. Woodward. "Next-Generation Integration Concepts for Air Separation Units and Gas Turbines." Journal of Engineering for Gas Turbines and Power 119, no. 2 (1997): 298–304. http://dx.doi.org/10.1115/1.2815575.

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The commercialization of Integrated Gasification Combined Cycle (IGCC) Power has been aided by concepts involving the integration of a cryogenic air separation unit (ASU) with the gas turbine combined-cycle module. Other processes, such as coal-based ironmaking and combined power/industrial gas production facilities, can also benefit from the integration. It is known and now widely accepted that an ASU designed for “elevated pressure” service and optimally integrated with the gas turbine can increase overall IGCC power output, increase overall efficiency, and decrease the net cost of power gen

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