Large Eddy Simulation of Supersonic Combustion Using the Eulerian Stochastic Fields Method

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Abstract

The development of supersonic combustion engines (scramjet-type) presents several challenges. Numerical simulations of scramjet engine combustion have become an attractive alternative to experimental investigations. However, supersonic combustion simulations still have several challenges: such as adequate modelling of shock/boundary layer and turbulence/chemistry interactions. The present work presents two large-eddy simulation probability density function (LES-PDF) novel formulations developed for high-speed applications. One is a conservative joint-scalar approach, where the joint-probability for reactive scalars and energy is solved, while the other is a joint velocity-scalar. The LES-PDF transport equations are solved using the Eulerian stochastic fields technique implemented in a density-based compressible solver. The performance of the models is verified through the simulations of two and three-dimensional supersonic reacting mixing layers and compared against DNS data from the literature. The results show that the joint-scalar formulation is accurate and robust, while the joint velocity-scalar closures require further development.

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Almeida, Y. P., & Navarro-Martinez, S. (2019). Large Eddy Simulation of Supersonic Combustion Using the Eulerian Stochastic Fields Method. Flow, Turbulence and Combustion, 103(4), 943–962. https://doi.org/10.1007/s10494-019-00055-7

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