Other
Scientific paper
Feb 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005esasp.563..297d&link_type=abstract
Proceedings of the Fifth European Symposium on Aerothermodynamics for Space Vehicles (ESA SP-563). 8-11 November 2004, Cologne,
Other
1
Scientific paper
The main purpose of this paper is to assess the capability of DES and LES methods to calculate unsteady side-loads encountered on a generic launcher afterbody. A comparison with the available experimental data including spectral analysis of pressure fluctuations with or without jet are given. The unsteady properties of the computed side loads are then discussed. Despite an overestimation of the pressure fluctuations on the emergence, the computations are able to recover the predominant frequency at a Strouhal number of 0.2. Moreover, the jet suction effect on the emergence pressure distribution is well predicted. The two points analysis has demonstrated the occurrence of highly coherent antisymmetrical wall pressure fluctuations on the emergence surface. With or without jet, the side-loads can be interpreted as a rotating vector uniformly distributed in the range 0;2' and whose magnitude follows Rayleigh's law. Key words: DES; LES; afterbody; side-loads.
Deck S.
Onera
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