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SUMMARY AND CONCLUSIONS A new low speed centrifugal compressor facility for 3-D vis- cous code assessment and fundamental flow physics research has been described. The facility is heavily instrumented with pressure and temperature probes, both in the rotating and stationary frames of reference, and has provisions for flow visualization and laser ye- locimetry. Preliminary measurements presented herein indicate the high quality of the data which can be expected from this facility. The synergism between experimental data and computational analysis during the development of the LSCC has led to modifi- cations of compressor geometry which facilitate its use for funda- mental flow physics research and computational code assessment. Although the CFD models used for analysis of the LSCC flow field may not have correctly predicted the magnitudes of the flow param- eters, they have been invaluable for capturing the essential features of the flow physics. The CFD results also provided useful guidance for the experimental efforts to validate the CFD predictions. ACKNOWLEDGMENTS The authors would like to thank C. Hah and K. Kirtley for their computational analyses and T. Strazisar for his helpful suggestions and assis:ance in preparing this paper. REFERENCES Dawes, W. N., 1988, "Development of a 3-D Navier Stokes Solver of Application to all Types of Turbomachinery." ASME Paper -GT-70. Dorney, D. J. and Davis, R. L., 1990, "Centrifugal Compressor Impeller Aerodynamics (A Numerical Investigation)," ASME Paper 90-GT-213. Eckardt. D., 1976, "Detailed FlowInvestigations within a High- Speed Centrifugal Compressor Impeller," Transactions of the ASME, Journal of Fluid Engineering, Vol. 98, No. 3. pp. 390-402. flah, C.. Bryans, A. C., Moussa, Z. and Tomsho, M. E., 1988, "Application of Viscous Flow Computations for the Aerodynamic Performance of a Back-Swept Impeller at Various Operating Condi- tions." Transactions of the ASME, Journal of Turbomachinery. Vol. 110, pp. 303-310. Hah,C. and Krain, H., 1989, "Secondary Flows and Vortex Moion in a High Efficiency Backswept Impeller at Design and Off- Design Conditions," Transactions of the ASME, Journal of Turbo- machinery, Vol. 112, No. 1, pp. 7-13. Hlayami, H., Senoo, Y. and Ucki, H., 1984, "Flow in the Inducer of a Centrifugal Compressor Measured with a Laier Velocimeter," ASME Paper 84-GT-74. Japiske, D. and Karon, D. M., 1989, "Laser Transit Anemometry Investigation of a High Speed Centrifugal Compressor," ASME Paper 89-GT-155. Jo n andrMoore, Jmp1e980""Thes Devnope of Wake Flow in a Centrifugal Impeller," Transactions of the ASMF, Journal of Engineering for Power, Vol. 102, No. 2, April, 1980. Johnson, M. W. and Moore, J., 1983, "Secondary Flow Mixing Losses in a Centrifugal Impeller," Transactions of the ASME, Jourual of Engineering for Power, Vol. 105, No. 1, January, 1983. Joslyn, H. D., Brasz, J. J., and Dring, R. P., 1990, "Centrifu- gal Compressor Impeller Aerodynamics (an Experimental Investiga- tion)," ASME Paper 90-GT-128. Jurkovich, M. S., Greber, I., Hingst, W. R., "Flow Visualization Studies of a 3-D Shock/Boundary Layer Interaction in the Pres- ence of a Non-Uniform Approach Boundary Layer," AIAA Paper 84-1560. Krain, H. and Hoffman, W., 1989, "Verification of an Im- peiler Design by Laser Measurements and 3D-Viscous Calculations," ASME Paper 89-GT-159. Moore, J. and Moore, J. G., 1989, "A Prediction of 3-1D Viscous Flow and Performance of the NASA Low-Speed Centrifugal Coin- pressor," Virginia Polytechnic Institute and State University, Me- chanical Engineering Department, Turbomachinery Research Group, Report No. JM/89-1, January 1989. Moore, J. and Moore, J. G., 1990, "A Prediction of 3-D Vis- cous Flow and Performance of the NASA Low-Speed Centrifugal Compressor," ASME Paper 90-GT-234. Wood,J.R., Adam, P. W. and Buggele, A. E., 1983 "NASA Low-Speed Centrifugal Compressor For Fundamental Research," NASA TM 83398. Young, M. Y., Spraker, W. A., and Struble, A. G., 1987, "Laser (L2F) Measurements at the Impeller Inlet and Tip Exit of a 91 mm Turbocharger Compressor," Third International Symposium on Laser Anemometry, ASME New York, 1987. nN 13PDF Image | NASA Low-Speed Centrifugal Compressor for 3-D Viscous Code
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