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TECHNICAL PAPERS

Short and Long Length-Scale Disturbances Leading to Rotating Stall in an Axial Compressor Stage With Different Stator/Rotor Gaps

[+] Author and Article Information
M. Inoue, M. Kuroumaru, S. Yoshida, M. Furukawa

Department of Energy and Mechanical Engineering, Kyushu University, Fukuoka, Japan

J. Turbomach 124(3), 376-384 (Jul 10, 2002) (9 pages) doi:10.1115/1.1458022 History: Received January 01, 2001; Online July 10, 2002
Copyright © 2002 by ASME
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References

Figures

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A schematic view of test section
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Pressure rise characteristics of compressor stage
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Wavelet transforms of a low-pass filtered pressure trace with the mother wavelets of Eqs. (2) and (3)
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Variation of wavelet transforms for specified scales of SLSD and LLSD
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Variation of flow-rate coefficient with the rotor rotation in transient stalling process for large front gap—(a) stalling process of mild stall (A→B), (b) stalling process of deep stall (C→D)
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Evolution of short and long length-scale wave for large front gap—(a) transient process from point (a) in Fig. 5(a), (b) transient process from point (b) in Fig. 5(a), (c) transient process from point (c) in Fig. 5(a), (d) transient process from point (d) in Fig. 5(b), (e) transient process from point (e) in Fig. 5(b), (f) transient process from point (f) in Fig. 5(b)
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Variation of flow-rate coefficient with the rotor rotation in transient stalling process for middle front gap
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Evolution of short and long length-scale wave for middle front gap—(a) transient process from point (a) in Fig. 7, (b) transient process from point (b) in Fig. 7, (c) transient process from point (c) in Fig. 7
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Evolution of short and long length-scale wave for small front gap—(a) transient process from point (a) in Fig. 10, (b) transient process from point (b) in Fig. 10
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Variation of flow-rate coefficient with the rotor rotation in transient stalling process for small front gap
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Illustrations for flow structure of short length-scale stall cell
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Pressure field traces on casing wall for large front gap—(a) stall inception, (b) mild stall condition
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Correlation functions between the casing wall pressure and the hot-wire signal 8 mm upstream of the rotor—(a) process of mild stall evolution for large front gap, (b) first half process of stall evolution for middle front gap
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Pressure field traces on casing wall at deep stall condition for large front gap
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Wavelet transforms of low-pass filtered pressure traces at two locations 45 deg apart in the circumferential direction at deep stall condition

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