Work

Causality in the shock wave/turbulent boundary layer interaction

Year: 2021

Type: article

Abstract: What drives flow unsteadiness in the shock wave/turbulent boundary layer interaction? Two mechanisms are widely recognized to play a role in this problem: upstream boundary layer forcing and downstream feedback. In this work, through the combined use of system identification, spectral decomposition, and linear stability analysis, we demonstrate that the downstream feedback, driven by upstream traveling acoustic waves, is the dominant mechanism behind the low-frequency shock motion. The tools described herein enable an accurate reconstruction of the shock fluctuations and could find potential applications in active flow control.

Source: Physical Review Fluids

DOI: 10.1103/physrevfluids.6.064609

Authors: Kenzo Sasaki, Diogo C. Barros, André V. G. Cavalieri, Lionel Larchevêque

Institutions: Instituto Tecnológico de Aeronáutica, Centre National de la Recherche Scientifique, Aix-Marseille Université, Institut Universitaire des Systèmes Thermiques Industriels

Language: English

Topic: Computational Fluid Dynamics and Aerodynamics

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funders: Conselho Nacional de Desenvolvimento Científico e Tecnológico, Grand Équipement National De Calcul Intensif

Awards: G216631384, G7354577168, G8647643059