Multi-objective 3d optimization of film cooling configurations in a high pressure vane based on genetic algorithm -artificial neural network

Document Type : Research Paper

Authors

Abstract

In this paper, the optimum parameters of a row of cylindrical film cooling holes has been investigated using a multi-objective evolutionary approach so as to achieve a compromise between film cooling effectiveness and coolant massflow rate which are in opposite directions and compete with each other. For this purpose, chordwise position of film holes, as well as diameter and injection angles were chosen as design parameters. Thirty samples were generated as database through CFD runs and artificial neural network (ANN) method was used to construct the surrogate model to approximate the optimization targets as functions of design parameters and genetic algorithm (GA) was used as optimizer. Design iterations were repeated 6 times and optimum configuration resulted in objective function values was found.

Keywords

Main Subjects

References

[1] R. J. Goldstein, E. R. G. Eckert, F. Burggraf, Effects of Hole Geometry and Density on Three Dimensional Film Cooling, Int. J. Heat Mass Transfer, Vol. 17, pp. 595-607, 1974.
[2] M. Gritsch, A. Schulz, S. Wittig, Adiabatic Wall Effectiveness Measurements of Film Cooling Holes with Expanded Exits, Journal of Turbomachinery, Vol. 120, pp. 549–556, 1998.
[3] M. Gritsch, W. Colban, H. Schar, K. Dobbeling, Effect of Hole Geometry on the Thermal Performance of Fan-Shaped Film Cooling Holes, ASME Journal of Turbomachinery, Vol. 127, pp. 718-725, 2005
[4] M. E. Taslim, A. Khanicheh, Film Effectiveness Downstream of a Row of Compound Angle Film Holes, Journal of Heat Transfer, Vol. 127, No. 4, pp. 434-440, 2005.
[5] Z. Gao, D. P. Narzary, J. Han, Film Cooling on a Gas Turbine Blade Pressure Side or Suction Side with Axial Shaped Holes, International Journal of Heat and Mass Transfer, Vol. 51, pp. 2139-2152, 2008.
[6] C. Saumweber, A. Schulz, Effect of Geometry Variations on the Cooling Performance of Fan-Shaped Cooling Holes, Universität Karlsruhe, Karlsruhe, Germany, pp. 905-919, 2008.
[7] W. F. Colban, K. A. Thole, D. Bogard, A Film Cooling Correlation for Shaped Holes on a Flat-Plate Surface, Journal of Turbomachinery,Vol. 133, No. 1, 2011.
[8] C. Q. Nguyen, P. L. Johnson, B. C. Bernier, S. H. Ho, J. S. Kapat, Comparison of FIlm Effectiveness and Cooling Uniformity of Conical and Cylindrical-Shaped Film Hole With Coolant-Exit Temperature Correction, Journal of Thermal Science and Engineering Application, Vol. 3, pp. 031011-1 -9, 2011.
[9] K. D. Lee, K. Y. Kim, Optimization of a Cylindrical Film Cooling Hole Using Surrogate Modeling, Numer.Heat Trans.A, Vol. 55, pp. 362–380, 2009.
[10] K. D. Lee, K. Y. Kim, Shape Optimization of a Fan-Shaped Hole to Enhance Film-Cooling Effectiveness, International Journal of Heat and Mass Transfer,Vol. 53, pp.2996-3005, 2010.
[11] K. D. Lee, S. M. Kim, K. Y. Kim, Multi-Objective Optimization of Film-Cooling Holes Considering Heat Transfer and Aerodynamic Loss, Proceedings of ASME Turbo Expo, Paper No. GT2011-45402, Vancouver, British Columbia, Canada, June 6-10, 2011.
[12] E. C. Ayoubi, Three-Dimensional Aero-Thermal Optimization of Film Cooling in a High Pressure Turbine, Phd Thesis, Department of Mechanical and Industrial Engineering, Concordia University, Montreal, Quebec, Canada, 2014.
[13] K. Kusterer, J. Dickhoff, T. Sugimoto, Multi-Objective Pareto Optimization of the NEKOMIMI Film Cooling Technology by Utilization of the SHERPA Algorithm, Proceedings of International Gas Turbine Congress, Tokyo, Japan, 15-20, 2015.
[14] Zolfagharian, Optimaization of Turbine Blade Cooling by Using of Combinational Methods, Semnan University, Ms.Thesis 198945, 1993.
[15] H. R. Rezaei, R. P. Gupta, G. W. Bryant, J. T. Hart, G. S. Liu, C. W. Bailey, T. F. Wall, S. Miyamae, K. Makino, Y. Endo, Thermal Conductivity of Coal Ash and Slags and Models Used, Fuel,  pp. 1697-1710, 2000.
[16] J. Han, S. Dutta, S. Ekkad, Gas Turbine Heat Transfer and Cooling Technology, New York: Taylor & Francis, 2000.

Files

Share

How to cite

Statistics