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Experimental investigations of an oscillating annular compressor cascade at reverse flow conditions

Chenaux, Virginie and Schönenborn, Harald and Ott, Peter (2012) Experimental investigations of an oscillating annular compressor cascade at reverse flow conditions. In: Proceedings "ISUAAT 13 (2012)". ISUAAAT 13 (2012) - The 13th International Symposium on Unsteady Aerodynamics, Aeroacoustics and Aeroelasticity of Turbomachines, 11.-14. Sept. 2012, Tokio, Japan.

Full text not available from this repository.

Abstract

While the advancement of computing hardware now enables accurate predictions of flutter and forced response at normal flow conditions during the compressor design phase, aeroelastic computations at off-design or reverse flow conditions remain a challenging task. During the flow reversal sequence of a surge cycle, complex aerodynamics occur which make the accurate prediction of the unsteady forces acting on the blades difficult to assess. The main objektive of this study is to increase the physical understanding of the unsteady contributions acting on the blades during the reverse flow sequence of a typical deep surge cycle. The approach adopted consisted in performing aeroelastic investigations on an annular compressor cascade at established reverse flow conditions. The cascade blades were equipped with unsteady pressure transducers and were excited to oscillations in travelling wave mode. In this paper, the blade surface fluctuating pressures recorded are analyzed for one flow operating condition. The messurements enable the determination of the blade aerodynamic stability and highlight the unsteady physical mechanisms present during the surge blowdown phase. For the investigated test case, steady-state numerical computations were carried out in parallel to the measurements to enable the comparison between both approaches.

Item URL in elib:https://elib.dlr.de/79203/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Experimental investigations of an oscillating annular compressor cascade at reverse flow conditions
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Chenaux, VirginieEcole Polytechnique Fédérale de LausanneUNSPECIFIED
Schönenborn, HaraldMTU Aero Engines GmbHUNSPECIFIED
Ott, PeterEcole Polytechnique Fédérale de LausanneUNSPECIFIED
Date:2012
Journal or Publication Title:Proceedings "ISUAAT 13 (2012)"
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:compressor cascade, controlled vibration, reverse flow, aerodynamic stability, unsteady flow, aeroelastic experimental investigation
Event Title:ISUAAAT 13 (2012) - The 13th International Symposium on Unsteady Aerodynamics, Aeroacoustics and Aeroelasticity of Turbomachines
Event Location:Tokio, Japan
Event Type:international Conference
Event Dates:11.-14. Sept. 2012
Organizer:University of Tokyo
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Propulsion Systems (old)
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Fan and Compressor Technologies (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: Erdmann, Daniela
Deposited On:19 Dec 2012 17:19
Last Modified:19 Dec 2012 17:19

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