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Communication Dans Un Congrès Année : 2019

Direct Numerical Simulation of the Shock Wave Boundary Layer Interaction (SWBLI)

Résumé

The aim of this paper is the direct numerical simulation of the shock wave boundary layer interaction (SWBLI). For these interactions, the separation bubble bubble, as well as the subsequent reflected shock wave, are known to oscillate in a low-frequency streamwise motion. The origin of those oscillations, however still unclear, has been related either to the shedding of vortices in the mixing layer downstream of the separation, or to the turbulent structures in the incoming boundary layer. An in-house parallel (MPI) Finite-Volume DNS/LES solver base on a high order finite volume scheme with shock capturing procedure is used to study this phenomenon. As a first step, by simulating the interaction between a laminar boundary layer and an incident shock wave, we suppress the suspected influence of the large turbulent structures of the boun- dary layer on the SWBLI unsteadiness. In this configuration, no unsteadiness of the SWBLI has been observed. Only the unsteadiness of the reattachement point have been observed. This result tends to suggest the importance of the turbulent structures of the incoming boundary layer in the low frequency oscillations of the SWBLI system. A Synthetic Eddy Method that we adapted to compressible flow, have been developed to achieve this objective without a prohibitive additional computational cost. The Synthetic Eddy Method is used to perform the DNS of a shock wave turbulent boundary layer interaction. This simulation allowed to observe the unsteadiness of the reattachement point but also of the separation point. The unsteadiness of the the whole SWBLI system has then been reproduced in this simulation.
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Dates et versions

hal-02391833 , version 1 (03-12-2019)

Identifiants

  • HAL Id : hal-02391833 , version 1

Citer

Ismaïl Ben Hassan Saïdi, Christian Tenaud, Guillaume Fournier. Direct Numerical Simulation of the Shock Wave Boundary Layer Interaction (SWBLI). 24e Congrès Français de Mécanique, Aug 2019, BREST, France. ⟨hal-02391833⟩
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