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TECHNICAL PAPERS

A Study on Impeller-Diffuser Interaction—Part II: Detailed Flow Analysis

[+] Author and Article Information
Kai U. Ziegler, Heinz E. Gallus, Reinhard Niehuis

RWTH Aachen, University of Technology, Institute of Jet Propulsion and Turbomachinery, 52062 Aachen, Germany, www.ist.rwth-aachen.de

J. Turbomach 125(1), 183-192 (Jan 23, 2003) (10 pages) doi:10.1115/1.1516815 History: Received October 26, 2001; Online January 23, 2003
Copyright © 2003 by ASME
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References

Figures

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Time-averaged absolute velocity (4M and 5), incidence (4M) and deviation angle (5) in the absolute and relative frame of reference (α4SS=16.5 deg,nred/n0=0.8, P1)
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Absolute velocity at 4M and 5 (α4SS=16.5 deg,nred/n0=0.8, P1)
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Incidence (4M) and deviation angle (5) (α4SS=16.5 deg,nred/n0=0.8, P1)
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Absolute angle at 4M and 5 (α4SS=16.5 deg,nred/n0=0.8, P1)
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Vortex in the diffuser throat
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Unsteady incidence at 4M (α4SS=16.5 deg,r4/r2=1.14,nred/n0=0.8, P1)
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Unsteady incidence at 4M (α4SS=16.5 deg,r4/r2=1.04,nred/n0=0.8, P1)
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Unsteadiness coefficients of relative velocity and angle at 2M and absolute velocity and angle at 4M and 5 (α4SS=16.5 deg,nred/n0=0.8, P1)
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Unsteady relative angle at 2M4SS=16.5 deg,r4/r2=1.04,nred/n0=0.8, P1)
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Unsteady absolute angle at 2M in the relative frame of reference (α4SS=16.5 deg,r4/r2=1.04,nred/n0=0.8, P1)
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Absolute velocity and angle at 2M in the relative frame of reference
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Meridional velocity at 2M (vaneless diffuser, nred/n0=0.8, P1)
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Absolute velocity and angle at 2M4SS=16.5 deg,nred/n0=0.8, P1)
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Time-averaged relative velocity and angle at 2M4SS=16.5 deg,nred/n0=0.8, P1)
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Velocity triangle at 2M (area average over the measured region, α4SS=16.5 deg,r4/r2=1.04,nred/n0=0.8, P1)
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Laser-2-focus measurement technique

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