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Large eddy simulation of supersonic combustion using the Eulerian stochastic fields method

DOI: 10.1615/THMT-18.1160
pages 1037-1048

Y. P. Almeida
Department of Mechanical Engineering, Imperial College London, Exhibition Road, South Kensington, London SW7 2AZ, UK

Salvador Navarro-Martinez
Department of Mechanical Engineering, Imperial College London, Exhibition Road, South Kensington, London SW7 2AZ, UK

Abstract

The scramjet engine is a propulsion system that could be used in hypersonic aircraft design. However, the development of such engine presents several challenges. The numerical simulation approach has become an attractive and relatively affordable alternative as a tool to investigate the scramjet engine. However, supersonic combustion simulation still imposes several constrains as shock/boundary layer and turbulence/chemistry interaction. This work presents a novel LES-PDF formulation, in which the probability density function transport equation is solved using the Eulerian stochastic fields technique. In this new model, stochastic equations are solved for the reactive scalars and are coupled with a compressible LES solver. The highly non-linear source terms, crucial in high-speed reacting flows, are solved accurately and do not require additional closure. The new model performance is evaluated through the simulations of three-dimensional supersonic reacting mixing layers and compared with DNS data from the literature.

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