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Analysis of Fluid-Structure Interaction for an Oscillating Compressor Cascade in Transonic Flow

Belz, J. and Carstens, V. and Hennings, H. (1999) Analysis of Fluid-Structure Interaction for an Oscillating Compressor Cascade in Transonic Flow. In: First ONERA-DLR Aerospace Symposium (ODAS), Paris, 21-24 June 1999.

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A new technique is presented in this paper which analyzes the aeroelastic behaviour of an oscillating compressor cascade in the time domain. In contrast to the classical linearized determination of the aeroelastic stability in the frequency domain where the computation of the unsteady aerodynamic forces is uncoupled from the calculation of aeroelastic stability boundaries, the present method simultaneously solves the structural and fluid equations using a specific coupling technique. The computed time series of the aeroelastic simultation of a system of twenty compressor blades performing torsional vibrations are presented. While the structural part of the governing aeroelastic equations is time-integrated by the algorithm of Newmark, the unsteady airloads are computed at every time step by an Euler upwind code. The vibrational behaviour of the cascade was investigated for two different cases: a pure subsonic flow and a transonic flow, where in the latter case the nonlinear fluid-structure interaction caused by oscillating shocks may significantly influence the aerodynamic damping of the blades. For the given cascade, of which each blade is modelled as a single-degree-of-freedom system, time-dependent, blade amplitudes were calculated for tuned as well as for mistuned blade assemblies.

Item URL in elib:https://elib.dlr.de/14160/
Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=1999,
Title:Analysis of Fluid-Structure Interaction for an Oscillating Compressor Cascade in Transonic Flow
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Journal or Publication Title:First ONERA-DLR Aerospace Symposium (ODAS), Paris, 21-24 June 1999
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:compressor cascade, aeroelastic stability, fluid-structure interaction, time domain method, transonic flow, mistuning
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L TT - Triebwerkstechnologien
DLR - Research theme (Project):L - Fan and Compressor Technologies (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: DLR-Beauftragter, elib
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 21:29

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