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TECHNICAL PAPERS

Secondary Flow Measurements in a Turbine Passage With Endwall Flow Modification

[+] Author and Article Information
Nicole V. Aunapu, Ralph J. Volino, Karen A. Flack, Ryan M. Stoddard

Department of Mechanical Engineering, United States Naval Academy, Annapolis, MD 21402

J. Turbomach 122(4), 651-658 (Feb 01, 2000) (8 pages) doi:10.1115/1.1311286 History: Received February 01, 2000
Copyright © 2000 by ASME
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References

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Figures

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Schematic of horseshoe vortex impinging upon suction-side blade 2
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Top view of test section showing flow control schemes: location of endwall fence as used by Chung and Simon 7; location of upstream jets (numbered 1–5); location of optimized boundary layer fence and endwall centerline jets
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Schematic of test section (top view) showing location of measurement planes A, B, and C
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Normalized velocity distribution along the blade surfaces
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Ink dot flow visualization on the endwall: baseline case
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Ink dot flow visualization on the suction-side blade: baseline case
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Secondary flow measurements at Planes A, B, and C (see Fig. 3) for baseline case. Top row: secondary velocity; second row: secondary kinetic energy loss coefficient; third row: total pressure loss coefficient; bottom row: turbulence intensity. Dimensions y (distance from suction wall) and z (distance from endwall) normalized on chord.
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Ink dot flow visualization on suction-side blade: optimized fence
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Secondary flow measurements at Planes A, B, and C (see Fig. 3) for case with optimized fence
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Ink dot flow visualization on suction-side blade: centerline wall jets
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Ink dot flow visualization on the endwall: centerline wall jets
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Secondary flow measurements at Planes A, B, and C (see Fig. 3) for case with centerline wall jets

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