CFD based methods for the computation of generalized aerodynamic forces

Dietmar Fleischer, Christian Breitsamter

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

In the present work time and frequency domain generalized aerodynamic forces (GAFs) are presented. For this purpose the first four structural modes of the AGARD 445.6 configuration are used to compute the corresponding generalized aerodynamic forces with the Euler methods AER-Eu (time domain) and AER-SDEu (frequency domain). Furthermore a reduced order model (ROM) of the aerodynamic system is generated as a linear state space model for fast computations of GAFs in the time domain. In order to generate the ROM the impulse response in the form of GAFs are computed with AER-Eu and further processed for the system identification of the CFD-System. The transfer from time domain into frequency domain is achieved via the Fourier analysis of the time series of the harmonic responses as well as the discrete Fourier transformation of the impulse responses for modal movement of the body. The results correlate well between the full CFD solution and the solution of the ROM.

Original languageEnglish
Title of host publicationNew Results in Numerical and Experimental Fluid Mechanics VIII
Subtitle of host publicationContributionsto the 17th STAB/DGLR Symposium Berlin, Germany 201
EditorsAndreas Dillmann, Hans-Peter Kreplin, Gerd Heller, Wolfgang Nitsche, Inken Peltzer
Pages331-338
Number of pages8
DOIs
StatePublished - 2013

Publication series

NameNotes on Numerical Fluid Mechanics and Multidisciplinary Design
Volume121
ISSN (Print)1612-2909

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