This is Part Four of a four-part paper. It begins with Section 16.0 and concludes the description of the comprehensive experiments and computational analyses that have led to a detailed picture of boundary layer development on airfoil surfaces in multistage turbomachinery. In this part, the computational predictions made using several modern boundary layer codes are presented. Both steady codes and an unsteady code were evaluated. The results are compared with time-averaged and unsteady integral parameters measured for the boundary layers. Assessments are made to provide guidance in using the predictive codes to locate transition and predict loss. Conclusions from the computational analyses are then presented.

Issue Section:
Research Papers
Topics:
Boundary layers, Compressors, Computation, Turbines, Airfoils, Turbomachinery
1.
Abu-Ghannam
 
B. J.
, and
Shaw
 
R.
,
1980
, “
Natural Transition of Boundary Layers—The Effects of Turbulence, Pressure Gradient and Flow History
,”
Journal of Mechanical Engineering Sciences
, Vol.
22
, pp.
213
–
228
.
2.
Crawford, M. E., and Kays, W. M., 1976, “STAN-5—A Program for Numerical Computation of Two-Dimensional Internal and External Boundary Layer Flows,” NASA CR 2742.
3.
Cumpsty, N. A., 1993-94, private communications.
4.
Fan
 
S.
, and
Lakshminarayana
 
B.
,
1996
, “
Computation and Simulation of Wake-Generated Unsteady Pressure and Boundary Layers in Cascades: Part 1—Description of the Approach and Validation, Part 2—Simulation of Unsteady Boundary Layer Flow Physics
,”
ASME JOURNAL OF TURBOMACHINERY
, Vol.
118
, pp.
96
–
122
.
5.
Jennions
 
I. K.
, and
Turner
 
M. G.
,
1993
, “
Three-Dimensional Navier–Stokes Computations of Transonic Fan Flow Using an Explicit Flow Solver and an Implicit k–ε Solver
,”
ASME JOURNAL OF TURBOMACHINERY
, Vol.
115
, pp.
261
–
272
.
6.
Schlichting, H., 1979, Boundary Layer Theory, McGraw-Hill, New York.
7.
Schmidt
 
R. C.
, and
Patankar
 
S. V.
,
1991
, “
Simulating Boundary Layer Transition With Low-Reynolds-Number k–ε Turbulence Models: Part I—an Evaluation of Prediction Characteristics: Part II—an Approach to Improving the Predictions
,”
ASME JOURNAL OF TURBOMACHINERY
, Vol.
113
, pp.
10
–
26
.
8.
Sharma, O. P., Ni, R. H., and Tanrikut, S., 1994, “Unsteady Flows in Turbines—Impact on Design Procedure,” AGARD LS 195.
9.
Wisler
 
D. C.
,
1985
, “
Loss Reduction in Axial-Flow Compressors Through Low-Speed Model Testing
,”
ASME Journal of Engineering for Gas Turbines and Power
, Vol.
107
, pp.
354
–
363
.
10.
Zerkle, R. D., and Lounsbury, R. J., 1987, “The Influence of Freestream Turbulence and Pressure Gradients on Heat Transfer to Gas Turbine Airfoils,” AIAA Paper No. 87-1917.
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