Reduction of Secondary Flow Losses in Turbine Cascades by Leading Edge Modifications at the Endwall

[+] Author and Article Information
H. Sauer, R. Müller, K. Vogeler

Dresden University of Technology, 01062 Dresden, Germany

J. Turbomach 123(2), 207-213 (Feb 01, 2000) (7 pages) doi:10.1115/1.1354142 History: Received February 01, 2000
Copyright © 2001 by ASME
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Secondary flow vortices
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(a) T106 Cascade data (equal blading for each modification) and (b) T106 profile and the modification (leading edge endwall bulb)
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Increase of the integral endwall loss coefficient downstream of a turbine cascade
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Spanwise endwall loss distribution/averaged pitch wise
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Local endwall loss distribution/measuring plane behind T106 and T106/3 at s2/lp=1
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Streamwise vorticity downstream of T106 and T106/3
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Net endwall losses for various bulb geometries
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Averaged exit flow angles vs. span/exp. and analytical results
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Numerical domain and mesh geometry for T106 (coarsened)
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Mesh geometry for T106/3 at the leading edge endwall




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