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Model-free simulations for compressible mixing layer

Javed, Afroz and Chakraborty, Debasis and Paul, PJ (2013) Model-free simulations for compressible mixing layer. In: Proceedings oof the Institution of Mechanical Engineers Part G-Journal of Aerospace Engneering, 227 (G6). pp. 977-991.

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Official URL: http://dx.doi.org/10.1177/0954410012446570

Abstract

Confined supersonic mixing layer is explored through model-free simulations. Both two- and three-dimensional spatio-temporal simulations were carried out employing higher order finite difference scheme as well as finite volume scheme based on open source software (OpenFOAM) to understand the effect of three-dimensionality on the development of mixing layer. It is observed that although the instantaneous structures exhibit three-dimensional features, the average pressure and velocities are predominantly two-dimensional. The computed wall pressures match well with experimental results fairly well, although three-dimensional simulation underpredicts the wall pressure in the downstream direction. The self-similarity of the velocity profiles is obtained within the duct length for all the simulations. Although the mixing layer thicknesses differ among different simulations, their growth rate is nearly the same. Significant differences are observed for species and temperature distribution between two- and three-dimensional calculations, and two-dimensional calculations do not match the experimental observation of smooth variations in species mass fraction profiles as reported in literature. Reynolds stress distribution for three-dimensional calculations show profiles with less peak values compared to two-dimensional calculations; while normal stress anisotropy is higher for three-dimensional case.

Item Type: Journal Article
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Additional Information: Copyright of this article belongs to Sage Publications Ltd.
Keywords: Compressible Mixing Layer; Model-Free Simulation; Three-Dimensionality
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 21 Jun 2013 05:10
Last Modified: 21 Jun 2013 05:10
URI: http://eprints.iisc.ernet.in/id/eprint/46718

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