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ISSN オンライン: 2642-0554

NUMERICAL INVESTIGATION OF TURBULENT FLOW AND SCALAR TRANSPORT IN AN INCLINED JET IN CROSSFLOW

Julien Bodart
Université de Toulouse, Institut Supérieur de l'Aéronautique et de l'Espace (ISAE) BP 54032 - 31055 TOULOUSE Cedex 4,France; Center for Turbulence Research Stanford University, Stanford, CA 94305, USA

Filippo Coletti
Department of Mechanical Engineering, Stanford University, 488 Escondido Mall, 94305, Stanford (CA),United States; Department of Aerospace Engineering and Mechanics University of Minnesota Minneapolis, MN 55455, USA

Ivan Bermejo-Moreno
Center for Turbulence Research Stanford University California, 94305-3030, USA

John K. Eaton
Dept. of Mechanical Engineering Stanford University 488 Panama Mall Stanford, CA 94305 USA

要約

An inclined jet in crossflow, characteristic of film cooling applications is studied with highly resolved LES. The configuration reproduces an experimental set-up in which three dimensional measurements of mean velocity and mean flow concentration have been performed using MRV/MRC completed with PIV measurements at some specific locations. The simulations are shown to capture with high fidelity both the separated flow inside the film cooling hole and the distribution of scalar concentration downstream of injection. This paper focuses on the gradient-diffusion hypothesis for the scalar fluxes in RANS modeling. In this configuration we show a large misalignment between turbulent scalar fluxes and the scalar concentration gradient in the streamwise direction.