Analysis of physical processes and operating behavior of gas turbine units with high loading of the gas turbine stage
Aspects of using a highly loaded stage in place of a group of stages in gas turbines are analyzed. Experimental data for individual wheels, as well as for the entire stage as a whole, are presented which confirm the possibility of obtaining efficiencies relative to braking of 0.87 – 0.89 during operation of the stage with turbine load parameters of 0.40 – 0.48. This makes it possible to reduce the number of stages without significant loss of gas dynamic efficiency. The cooling air feed rate is lowered and fewer parts are needed, thereby reducing the cost of the entire turbine.
Keywordsgas turbine highly loaded transonic stage gas dynamic efficiency efficiency relative to braking
Unable to display preview. Download preview PDF.
- 1.J. M. Hannis, R. Maali, and G.Woollatt, “The design and development of a high work transonic turbine stage,” in: Proc. of the Institution of Mechanical Engineers. Turbomachinery: Latest Developments in a Changing Scene. Eur. Conf., London (1991).Google Scholar
- 2.A. V. Granovski, A. M. Karelin, and K. M. Popov, “Experimental investigation of flow structure and losses in a high load transonic turbine stage,” in: AGARD Conf. Proc. 571 (1995).Google Scholar
- 3.V. D. Venedictov, M. Ja. Ivanov, R. Z. Nigmatullin, and A. J. Rechcoblit, Study of High Loaded Single-Stage Turbine Aerodynamics, ISABE 2003 – 1039.Google Scholar
- 4.V. D. Venediktov, Gas Dynamics of Cooled Turbines [in Russian], Mashinostroenie, Moscow (1990).Google Scholar
- 5.V. G. Krupa, Simulation of Steady and Unsteady Viscous Flows in Turbomachinery, AGARD Lecture Series, No. 198, LS-198.Google Scholar
- 6.A. M. Karelin, “Design of a turbine profile louvre based on rational parametric curves,” Trudy TsIAM, 9(1233) (1989).Google Scholar
- 7.V. D. Venediktov and A. V. Granovskii, “Study of transonic turbine louvres and the feasibility of optimizing them by numerical methods,” Teploénergetika, No. 4 (1981).Google Scholar
- 8.V. D. Venediktov, A. V. Granovskii, A. M. Karelin, et al., Atlas of Experimental Characteristics of Flat Louvres for Cooled Turbines [in Russian], Izd. TsIAM (1990).Google Scholar
- 9.V. D. Venediktov, A. V. Granovskii, and A. N. Kolesov, “Experimental study of nozzle sector louvres,” Trudy TsIAM, 12(1280) (1990).Google Scholar
- 10.S. P. Harasgama and C. D. Burton, “Film cooling research on the endwall of a turbine nozzle guide vane in a short duration annular cascade,” ASME J. Turbomach., 114 (1992).Google Scholar
- 11.S. Friedrichs, H. P. Hodson, and W. N. Dawes, “Aerodynamic aspects of endwall film-cooling,” ASME J. Turbomach., 119 (1997).Google Scholar