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TECHNICAL PAPERS

Unsteady Boundary Layer Development Due to Wake Passing Effects on a Highly Loaded Linear Compressor Cascade

[+] Author and Article Information
Lothar Hilgenfeld, Michael Pfitzner

Institut fuer Strahlantriebe, Universitaet der Bundswehr Muenchen, Werner-Heisenberg-Weg 39, 85579 Neubiberg, Germany

J. Turbomach 126(4), 493-500 (Dec 29, 2004) (8 pages) doi:10.1115/1.1791290 History: Received October 01, 2003; Revised March 01, 2004; Online December 29, 2004
Copyright © 2004 by ASME
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References

Figures

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Compressor cascade V103-220
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Wake generator (EIZ) with installed compressor cascade
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High speed cascade wind tunnel
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Unsteady inflow conditions; design inlet conditions
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Isentropic profile Mach number distribution at design inlet conditions
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Contour of unsteady isentropic profile Mach number
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Unsteady pressure signals at xax/lax=0.65
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Ensemble averaged pressure traces, bar pitch=120 mm, bar speed=40 m/s (tbar/t=1,Sr1=0.44)
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Ensemble averaged pressure traces, bar speed=20 m/s
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Ensemble averaged pressure traces, bar pitch=120 mm (tbar/t=1), bar speed=20 m/s
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Ensemble averaged RMS values, Ma1=0.67,Re1=450,000,tbar=40 mm,ubar=20 m/s(tbar/t=1/3,Sr1=0.66)
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Ensemble averaged values at single sensor location xax/lax=0.40,Ma1=0.67,Re1=450,000,tbar=40 mm,ubar=20 m/s(tbar/t=1/3,Sr1=0.66)
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Ensemble averaged QWSS values, Ma1=0.67,Re1=450,000,tbar=40 mm,ubar=20 m/s(tbar/t=1/3,Sr1=0.66)
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Ensemble averaged RMS values, Ma1=0.67,Re1=450,000,tbar=120 mm,ubar=20 m/s(tbar/t=1,Sr1=0.22)
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Ensemble averaged RMS values, Ma1=0.67,Re1=700,000,tbar=120 mm,ubar=20 m/s(tbar/t=1,Sr1=0.22)
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Ensemble averaged velocity, Ma1=0.67,Re1=450,000,tbar=40 mm,ubar=20 m/s(tbar/t=1/3,Sr1=0.66)
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Ensemble averaged velocity, Ma1=0.67,Re1=450,000,tbar=120 mm,ubar=20 m/s(tbar/t=1,Sr1=0.22)
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Momentum thickness and shape factor at xax/lax=0.97,Ma1=0.67,Re1=450,000,tbar=40 mm,ubar=20 m/s(tbar/t=1/3,Sr1=0.66)
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Momentum thickness and shape factor at xax/lax=0.75,Ma1=0.67,Re1=450,000,tbar=120 mm,ubar=20 m/s(tbar/t=1,Sr1=0.22)
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Ensemble averaged shape factors, Ma1=0.67,Re1=450,000,tbar=40 mm,ubar=20 m/s(tbar/t=1/3,Sr1=0.44)

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