Most turbine cascade studies in the literature have been performed in straight-endwall, high-aspect-ratio, linear cascades. As a result, there has been little appreciation for the role of, and added complexity imposed by, reduced aspect ratios. There also has been little documentation of endwall profiling with these reduced spans. To examine the role of these factors on cascade hydrodynamics, a large-scale nozzle guide vane simulator was constructed at the Heat Transfer Laboratory of the University of Minnesota. This cascade is comprised of three airfoils between one contoured and one flat endwall. The geometries of the airfoils and endwalls, as well as the experimental conditions in the simulator, are representative of those in commercial operation. Measurements with hot-wire anemometry were taken to characterize the flow approaching the cascade. These measurements show that the flow field in this cascade is highly elliptic and influenced by pressure gradients that are established within the cascade. Exit flow field measurements with triple-sensor anemometry and pressure measurements within the cascade indicate that the acceleration imposed by endwall contouring and airfoil turning is able to suppress the size and strength of key secondary flow features. In addition, the flow field near the contoured endwall differs significantly from that adjacent to the straight endwall. [S0889-504X(00)01104-1]
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October 2000
Technical Papers
Flow Measurements in a Nozzle Guide Vane Passage With a Low Aspect Ratio and Endwall Contouring
Steven W. Burd,
Steven W. Burd
Heat Transfer Laboratory, University of Minnesota, Minneapolis, MN 55455
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Terrence W. Simon
Terrence W. Simon
Heat Transfer Laboratory, University of Minnesota, Minneapolis, MN 55455
Search for other works by this author on:
Steven W. Burd
Heat Transfer Laboratory, University of Minnesota, Minneapolis, MN 55455
Terrence W. Simon
Heat Transfer Laboratory, University of Minnesota, Minneapolis, MN 55455
Contributed by the International Gas Turbine Institute and presented at the 45th International Gas Turbine and Aeroengine Congress and Exhibition, Munich, Germany, May 8–11, 2000. Manuscript received by the International Gas Turbine Institute February 2000. Paper No. 2000-GT-213. Review Chair: D. Ballal.
J. Turbomach. Oct 2000, 122(4): 659-666 (8 pages)
Published Online: February 1, 2000
Article history
Received:
February 1, 2000
Citation
Burd , S. W., and Simon, T. W. (February 1, 2000). "Flow Measurements in a Nozzle Guide Vane Passage With a Low Aspect Ratio and Endwall Contouring ." ASME. J. Turbomach. October 2000; 122(4): 659–666. https://doi.org/10.1115/1.1312799
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