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Computation of Unsteady Transonic 3D Flow in Oscillating Turbomachinery Bladings by an Euler Algorithm with Deforming Grids.

Carstens, V. (1994) Computation of Unsteady Transonic 3D Flow in Oscillating Turbomachinery Bladings by an Euler Algorithm with Deforming Grids. Elsevier Science B.V., Amsterdam, Holland. Seventh International Symposium on Unsteady Aerodynamics and Turbomachines, Fukuoka, Japan, September 25-29, 1994..

Full text not available from this repository.

Abstract

A numerical method is presented for obtaining the unsteady fully 3-D transonic flow field in an isolated row of oscillating blades. Two important features characterize the present analysis. The first is the use of a flux-vector-splitting algorithm, which is well known for its excellent shock-capturing properties and its numerical robustness. The second feature is the coupling of the unsteady flow calculation with an interactive grid generation, a method which enables the code to treat every possible oscillation mode of the blade assembly. After each step a new boundary-fitted grid for all blade channels under consideration is generated, taking into account the movement of the blades. Written in an implicit form, the Euler code allows for rather large time steps, thus guaranteeing the calculation of the necessary aerodynamic coefficients with reasonable time effort - even for low reduced frequencies. The present investigations are restricted to special prescribed eigenmodes of the blades, namely tuned modes where all blades perform oscillations with the same frequency, same amplitude, and a constant interblade phase angle. Results of unsteady pressure and lift coefficients are presented for heaving motions of the blades at different interblade phase angles. A comparison with experimental results from a special standard configuration of the "Workshop on Aeroelasticity in Turbomachines" gives an insight into the reliability of the present method.

Item URL in elib:https://elib.dlr.de/39692/
Document Type:Conference or Workshop Item (Paper)
Additional Information: institution=Y. Tanida, M. Namba., LIDO-Berichtsjahr=1994, pages=19,
Title:Computation of Unsteady Transonic 3D Flow in Oscillating Turbomachinery Bladings by an Euler Algorithm with Deforming Grids.
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Carstens, V.UNSPECIFIEDUNSPECIFIED
Date:1994
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Publisher:Elsevier Science B.V., Amsterdam, Holland
Status:Published
Keywords:Unsteady aerodynamics, Transonic cascade aerodynamics, deforming grids, flutter in turbomachinery bladings, Euler algorithm.
Event Title:Seventh International Symposium on Unsteady Aerodynamics and Turbomachines, Fukuoka, Japan, September 25-29, 1994.
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 10:51

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