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Influence of Mach Number and Aerodynamic Loading on Rotating Instability in an Annular Compressor Cascade
Zitatschlüssel 2012_beselt_asme
Autor Beselt, C. and Peitsch, D.
Seiten pp. 2711-2720, GT2012-69393
Jahr 2012
ISBN 978-0-7918-4474-8
DOI 10.1115/GT2012-69393
Ort Copenhagen, Denmark
Journal ASME Turbo Expo 2012: Turbine Technical Conference and Exposition
Jahrgang Volume 8: Turbomachinery, Parts A, B, and C
Monat 06
Notiz Technische Universität Berlin:
C. Beselt, D. Peitsch
Herausgeber ASME
Serie Turbo Expo: Power for Land, Sea, and Air
Zusammenfassung An experimental study was conducted to investigate the influence of Mach number and aerodynamic loading on Rotating Instability (RI). Investigations were performed on an annular compressor cascade with radial clearance at the hub. In addition to steady flow field measurements, time resolved measurements of static wall-pressure at the hub, close to the tip clearance, were performed. For a specific range of incidence angles, RI could be detected at all flow speeds (Ma = 0.2–0.7). Shortly before the inception of RI, a sudden increase in pressure loss coefficient and outflow angle was detected by steady flow field measurements. The time resolved measurements showed an abruptly broadband increase of amplitude in the frequency range, in which RI occurs at higher loadings. RI propagates with 25–33% of the circumferential component of the upstream flow speed. Furthermore it is possible to scale the power spectral density function of the unsteady data with Strouhal number.
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