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Computation of the Unsteady Transonic 2D Cascade Flow by an Euler Algorithm with Interactive Grid Generation.

Carstens, V. (1992) Computation of the Unsteady Transonic 2D Cascade Flow by an Euler Algorithm with Interactive Grid Generation. In: AGARD Conference Proceedings 507, Transonic Unsteady Aerodynamics and Aeroelsticity, March 1992.. Printed by Specialised Printing Services Ltd.,40 Chigwell Lane, Loughton, Essex IG10 3TZ, GB.. Papers presented at the 73rd Meeting of the AGARD Structures and Materials Panel, San Diego, Ca., USA, 7th-11th October 1991..

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Abstract

This paper presents the numerical results of a code for computing the unsteady transonic flow in a 2D cascade of harmonically oscillating blades. The calculation of the flow field is based on an Euler code using flux vector splitting. After a description of the basic equations and the special numerical techniques applied in the code, results are presented for the first harmonics of pressure, lift and moment coefficients. For the present investigations, two basic oscillation modes were chosen: tuned modes where all blades perform oscillations with the same frequency, same amplitude and a constant interblade phase angle, and mistuned modes, where all blades are oscillating with the same amplitude, but with varying frequency from one blade to another. The computed results refer to two standard configurations given by the IUTAM "Workshop on Aeroelasticity in Turbomachine Cascades", one of which is a subsonic-transonic turbine cascade, and the other is a subsonic-transonic compressor cascade. In the case of tuned bending modes, the theoretical results are compared with the experimental data from the turbine standard configuration. Special attention is directed to the occurrence of aerodynamic instability in the oscillating cascade. It can be shown that the interblade phase angles, at which the above-mentioned experimental test case shows unstable behavior, are generally well-reproduced by the computational results.

Item URL in elib:https://elib.dlr.de/39555/
Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=1992, pages=AGARD-CP-507,
Title:Computation of the Unsteady Transonic 2D Cascade Flow by an Euler Algorithm with Interactive Grid Generation.
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Carstens, V.UNSPECIFIEDUNSPECIFIED
Date:1992
Journal or Publication Title:AGARD Conference Proceedings 507, Transonic Unsteady Aerodynamics and Aeroelsticity, March 1992.
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Publisher:Printed by Specialised Printing Services Ltd.,40 Chigwell Lane, Loughton, Essex IG10 3TZ, GB.
Series Name:AGARD-CP-507
Status:Published
Keywords:Unsteady aerodynamics, unsteady cascade flow, turbine cascades, compressor cascades, flutter stability of turbomachine cascades.
Event Title:Papers presented at the 73rd Meeting of the AGARD Structures and Materials Panel, San Diego, Ca., USA, 7th-11th October 1991.
HGF - Research field:UNSPECIFIED
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:UNSPECIFIED
DLR - Program:L TT - Triebwerkstechnologien
DLR - Research theme (Project):UNSPECIFIED
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: DLR-Beauftragter, elib
Deposited On:02 Apr 2006
Last Modified:27 Apr 2009 10:47

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