Lattice Boltzmann Simulations of a Supersonic Cavity

Conference paper (2017)

Authors

D. Singh Dassault Systèmes
A. Pinto Ribeiro Dassault Systèmes
Benedikt Koenig Dassault Systèmes
Ehab Fares Dassault Systèmes
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Published Date

2017

Language

English

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Abstract

Unsteady simulations using PowerFLOW, a Lattice-Boltzmann-method-based solver, of a rectangular deep (L/D= 4.5), open-flow cavity at subsonic and supersonic speeds (M= 0.6 to 1.5) are presented. Acoustic sound pressure levels and cavity modes are compared to experiments and analytical models. The simulations show a good quantitative and qualitative agreement with the experiments for the spectra at various probes located in and around the cavity. The shear layer mode is characterized by Rossiter modes and the frequencies are well predicted. The three-dimensionality in the flow is also identified by the presence of lateral pressure gradients, resulting in the interaction of lateral and longitudinal modes.