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EVOLUTION OF THE AERODYNAMIC STABILITY OF AN OSCILLATING ANNULAR COMPRESSOR CASCADE WITH INLET REVERSE FLOW CONDITION VARIATIONS

Chenaux, Virginie and Schönenborn, Harald and Ott, Peter (2013) EVOLUTION OF THE AERODYNAMIC STABILITY OF AN OSCILLATING ANNULAR COMPRESSOR CASCADE WITH INLET REVERSE FLOW CONDITION VARIATIONS. Lappeenranta University of Technology. ETC 10 (2013), 10th European Conference on Turbomachinery, 15.-19. Apr. 2013, Lappeenranta, Finnland.

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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 objective 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 controlled oscillations in travelling wave mode. In this paper, the blade surface fluctuating pressures recorded are analyzed for different flow operating conditions. The measurements enable the determination of the blade aerodynamic stability as well as the identification and characterization of the unsteady physical mechanisms present during the surge blow-down phase.

Item URL in elib:https://elib.dlr.de/82360/
Document Type:Conference or Workshop Item (Speech)
Title:EVOLUTION OF THE AERODYNAMIC STABILITY OF AN OSCILLATING ANNULAR COMPRESSOR CASCADE WITH INLET REVERSE FLOW CONDITION VARIATIONS
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Chenaux, Virginievirginie.chenaux (at) dlr.deUNSPECIFIED
Schönenborn, Haraldharald.schoenenborn (at) mtu.deUNSPECIFIED
Ott, Peterpeter.ott (at) epfl.chUNSPECIFIED
Date:April 2013
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Publisher:Lappeenranta University of Technology
Status:Published
Keywords:compressor cascade, controlled vibration, reverse flow, aerodynamic stability, unsteady flow, aeroelastic experimental investigation
Event Title:ETC 10 (2013), 10th European Conference on Turbomachinery
Event Location:Lappeenranta, Finnland
Event Type:international Conference
Event Dates:15.-19. Apr. 2013
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 > Aeroelastic Experiments
Deposited By: Chenaux, Virginie
Deposited On:06 Sep 2013 14:30
Last Modified:13 Oct 2015 09:21

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