Wavelet analysis of supersonic shock-boundary-layer interaction

Author:

Kokkinakis Ioannis W.1ORCID,Khujadze George2ORCID,Drikakis Dimitris1ORCID,Spottswood S. Michael3

Affiliation:

1. Institute for Advanced Modeling and Simulation, University of Nicosia 1 , Nicosia CY-2417, Cyprus

2. Chair of Fluid Mechanics, University of Siegen 2 , 57068 Siegen, Germany

3. Air Force Research Laboratory, Wright Patterson AFB 3 , Ohio 45433-7402, USA

Abstract

We present a wavelet analysis of supersonic shock-boundary-layer interaction. We have used direct numerical simulation data for supersonic flow over a compression ramp and performed orthogonal anisotropic wavelets. The wavelet-based method of extracting coherent structures is applied to the flow vorticity field, decomposed into coherent and incoherent contributions using thresholding of the wavelet coefficients. The statistics of the coherent part of vorticity are close to the statistics of the total field. The study aims to improve our understanding of the shock-boundary-layer interaction, the role of vorticity, and the relationship between the flow's coherent and incoherent vorticity components with the near-wall sound. Our analysis shows a substantial correlation between the incoherent part of vorticity components and wall-pressure fluctuations.

Funder

European Office of Aerospace Research and Development

Publisher

AIP Publishing

Subject

Condensed Matter Physics,Fluid Flow and Transfer Processes,Mechanics of Materials,Computational Mechanics,Mechanical Engineering

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