Grid Orthogonality Effects on Predicted Turbine Midspan Heat Transfer and Performance

The effect of five different C type grid geometries on the predicted heat transfer and aerodynamic performance of a turbine stator is examined. Predictions were obtained using two flow analysis codes. One was a finite difference analysis, and the other was a finite volume analysis. Differences among the grids in terms of heat transfer and overall performance were small. The most significant difference among the five grids occurred in the prediction of pitchwise variation in total pressure. There was consistency between results obtained with each of the flow analysis codes when the same grid was used. A grid generating procedure in which the viscous grid is embedded within an inviscid type grid resulted in the best overall performance.Copyright © 1994 by ASME

[1]  Craig A. Stephens,et al.  Modeling of the heat transfer in bypass transitional boundary-layer flows , 1991 .

[2]  H. Lomax,et al.  Thin-layer approximation and algebraic model for separated turbulent flows , 1978 .

[3]  A. Arnone,et al.  Navier-Stokes turbine heat transfer predictions using two-equation turbulence , 1992 .

[4]  T. Arts,et al.  Aero-thermal investigation of a highly loaded transonic linear turbine guide vane cascade: A test case for inviscid and viscous flow computations , 1990 .

[5]  A nonperiodic boundary approach for computation of compressible viscous flows in advanced turbine cascades , 1993 .

[6]  R. Sorenson.  A computer program to generate two-dimensional grids about airfoils and other shapes by the use of Poisson's equation , 1980 .

[7]  Awatef Hamed,et al.  Navier-Stokes Computations for Turbulent Flow Predictions in Transonic Turbine Cascade Using a Zonal Approach , 1993 .

[8]  M. Liou,et al.  Navier-Stokes solution of transonic cascade flows using nonperiodic C-type grids , 1992 .

[9]  Mark G. Turner,et al.  The Use of Orthogonal Grids in Turbine CFD Computations , 1993 .

[10]  A. E. Forest.  Engineering predictions of transitional boundary layers , 1977 .

[11]  P. W. Giel,et al.  Three-dimensional Navier-Stokes heat transfer predictions for turbine blade rows , 1992 .

[12]  K. Chien,et al.  Predictions of Channel and Boundary-Layer Flows with a Low-Reynolds-Number Turbulence Model , 1982 .

[13]  Frederick F. Simon,et al.  The use of transition region characteristics to improve the numerical simulation of heat transfer in bypass transitional flows , 1995 .

[14]  Rodrick V. Chima,et al.  Explicit multigrid algorithm for quasi-three-dimensional viscous flows in turbomachinery , 1987 .

[15]  S. P. Harasgama,et al.  Calculation of Heat Transfer to Turbine Blading Using Two-Dimensional Boundary Layer Methods , 1993 .

[16]  B. Lakshminarayana,et al.  Navier-Stokes analysis of turbine flowfield and external heat transfer , 1995 .

[17]  H. D. Weingold,et al.  Prediction of Compressor Cascade Performance Using a Navier–Stokes Technique , 1988 .

[18]  R. E. Mayle,et al.  The Role of Laminar-Turbulent Transition in Gas Turbine Engines , 1991 .