A METHOD FOR CALCULATION OF FORCES ACTING ON AIR COOLED GAS TURBINE BLADES BASED ON THE AERODYNAMIC THEORY

Abstract

The paper presents the mathematical model and the procedure for calculation of the resultant force acting on the air cooled gas turbine blade(s) based on the aerodynamic theory and computation of the circulation around the blade profile. In the conducted analysis was examined the influence of the cooling air mass flow expressed through the cooling air flow parameter λc, as well as, the values of the inlet and outlet angles β1 and β2, on the magnitude of the tangential and axial forces. The procedure and analysis were exemplified by the calculation of the tangential and axial forces magnitudes.

Keywords

Dates

  • Submission Date2011-04-16
  • Revision Date2012-06-25
  • Acceptance Date2012-12-11
  • Online Date2013-01-20

DOI Reference

10.2298/TSCI110416001G

References

  1. Dun M. G., Convective Heat Transfer and Aerodynamics in Axial Flow Turbines, Transactions of the SME, Journal of Turbomachinery, Vol. 123, (2001), October, pp. 637-686.
  2. Lim H. C., Pullan G. and Northall J., Estimating the Loss Associated With Film Cooling for a Turbine Stage, Transactions of the SME, Journal of Turbomachinery, Vol. 134, (2012), March, pp. 021011-1 to 021011-10.
  3. Povey T., Effect of Film Cooling on Turbine Capacity, Transactions of the SME, Journal of Turbomachinery, Vol. 132, (2010), January, pp. 011901-1 to 011901-10.
  4. Dixon S. L.: Fluid Mechanics, Thermodynamics of Turbomachinery, Pergamon Press, London, GB, 1975.
  5. Traupel W.: Termische Turbomaschinen I und II, Springer-Verlag, Berlin/ Heilderberg/New York, 1982.
  6. Grković V.: A Method for Calculation of Forces Acting on the Gas Turbine Blades with Film and Effusion Cooling, Proceedings on CD, XIV Brazilian Congress of Mechanical Engineering, Obeid Plaza Hotel Convention Center - Bauru - SP Brazil, December 08-12th 1997.
  7. Stetter H.: Power and Working Maschins II, IТSМ, University of Stuttgart, Stuttgart, Germany, 1993 (in German).
  8. Ito S., Eckert, E. R. G. and Goldstein, R. J.: Aerodynamic Losses in a Gas Turbine Stage With Film Cooling, Transactions of the ASME, Journal of Engineering for Gas Turbines and Power, vol. 102, October 1980, pp. 964-970.
  9. Glezer B.: Some Aspects of Industrial Turbine Cooling Development, International Symposium: Heat Transfer in Turbomachinery, August 24-28, 1992, Athens, Greece
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