Investigation of separation properties of turbulent boundary layer at its sequential interaction with shocks of different strengths

The results are presented for numerical modelling of two-dimensional flows with large pressure gradients in a wide range of freestream parameters (M = 2−4, Re 1 = 5−30·10 6 1/m) and the intensities of perturbing factors. Computations were performed with the use of averaged unsteady Navier — Stokes e...

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Published inThermophysics and aeromechanics Vol. 15; no. 3; pp. 453 - 461
Main Authors Goldfeld, M. A., Zakharova, Yu. V., Fedorova, N. N.
Format Journal Article
LanguageEnglish
Published Dordrecht SP MAIK Nauka/Interperiodica 01.09.2008
Subjects
Physics
Physics and Astronomy
Thermodynamics
shock wave
interaction
expansion wave
boundary layer
separation zone
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Summary:The results are presented for numerical modelling of two-dimensional flows with large pressure gradients in a wide range of freestream parameters (M = 2−4, Re 1 = 5−30·10 6 1/m) and the intensities of perturbing factors. Computations were performed with the use of averaged unsteady Navier — Stokes equations of a viscous heat-conducting gas. The structure of a turbulent boundary layer at its passage through a single shock and a system of shocks of different strengths, which lie at a fixed distance from one another, was investigated numerically. In the case of the boundary layer passage through a system of shocks, the influence of the first interaction on the structure and separation properties of the boundary layer behind the second shock was investigated. The presence of a preliminary shock was shown to improve the boundary layer capability to withstand separation ahead of the secondary interaction region.
ISSN:0869-8643
1531-8699
DOI:10.1134/S0869864308030116