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NUMERICAL INVESTIGATION OF THE INFLUENCE OF UPSTREAM CONDITIONS ON PROPERTIES OF SHOCK NOISE IN SHOCK/MIXING LAYER INTERACTION

Guillaume Daviller
Department of Fluid, Thermal and Combustion Sciences Pprime Institute, CNRS-Universite de Poitiers, ISAE-ENSMA 43 rue de I'Aerodrome, F-86036 Poitiers CEDEX, France; European Centre for Research and Advanced Training in Scientific Computation 31057

Guillaume Lehnasch
Department of Fluid, Thermal and Combustion Sciences Pprime Institute, CNRS-Universite de Poitiers, ISAE-ENSMA 43 rue de I'Aerodrome, F-86036 Poitiers CEDEX, France

Peter Jordan
Department of Fluid, Thermal and Combustion Sciences Pprime Institute, CNRS-Universite de Poitiers, ISAE-ENSMA 43 rue de I'Aerodrome, F-86036 Poitiers CEDEX, France

Abstract

A spatially developing two-dimensional mixing layer interacting with an incident compression wave is simulated in order to analyse the mechanisms leading to the shock noise emission. Various upstream forcing modes leading to various characteristics of subsequent travelling two-dimensional coherent structures are tested in order to assess their respective influence on the leading mechanisms of shock leakage and subsequent shock noise properties.