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Experimental Evaluation of Inlet Turbulence, Wall Boundary Layer, Surface Finish, and Fillet Radius on Small Axial Turbine Stator Performance
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English
Abstract
The results of an experimental investigation are presented which establish the effects of surface finish, fillet radius, inlet boundary layer thickness, and free-stream inlet turbulence level on the aerodynamic performance of a small axial flow turbine stator. The principal objective was to help understand why large turbine efficiency is not maintained when a large turbine is scaled to a smaller size and to provide the turbine designer with the performance compromises expected for a small scale design. A comprehensive test matrix was used to gain an understanding of the effects of each variable over the full range of all the other variables.
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Authors
Citation
Kozak, A., Brockett, W., and Haas, J., "Experimental Evaluation of Inlet Turbulence, Wall Boundary Layer, Surface Finish, and Fillet Radius on Small Axial Turbine Stator Performance," SAE Technical Paper 821475, 1982, https://doi.org/10.4271/821475.Also In
References
- Whitney, Warren J. Szanca, Edward M. Moffit, Thomas P. Monroe, Daniel E. “Cold-Air Investigation of a Turbine for High-Temperature Engine Application,” NASA TN D-3751 1967
- Prust Herman W. Jr. Schum, Harold J. Behning, Frank P. “Cold Air Investigation of a Turbine for High-Temperature Engine Application,” NASA TN D-4418 1968
- Dubruge, L. L. “The Aerodynamic Significance of Fillet Geometric in Turbo-compressor Blade Rows,” ASME Paper Number 80-GT-41
- McNally, William D. “Fortran Program for Calculating Compressible Laminar and Turbulent Boundary Layers in Arbitrary Gradients,” NASA TN D-5681 1970
- Schlichting, H. Boundary - Layer Theory McGraw-Hill Book Company New York 1968
- Horlock, J. H. Axial Flow Turbines Robert E. Krieger Publishing Company Huntington, New York 1973 102
- Dunham, J. “A Review of Cascade Data on Secondary Losses in Turbines,” Journal of Mechanical Science 1970 12 1
- Booth, T. C “An Analysis of the Turbine Endwall Boundary Layer and Aerodynamic Losses,” ASME Paper No. 75-GT-23
- Langston, L.S. “Crossflows in a Turbine Cascade Passage,” ASME Paper Number 80-GT-5
- Brockett, Walter Kozak, Andrew, “Small Axial Turbine Stator Technology Program,” NASA CR-165602 1982