Title: Numerical simulation of supersonic and turbulent combustion with transverse sonic fuel injection

Authors: Mohammed Kamel; Farouk Owis; Moumen Idres; Aly Hashem

Addresses: Aerospace Engineering Department, Faculty of Engineering, Cairo University, Giza, Egypt ' Aerospace Engineering Department, Faculty of Engineering, Cairo University, Giza, Egypt ' Aerospace Engineering Department, Faculty of Engineering, Cairo University, Giza, Egypt ' Aerospace Engineering Department, Faculty of Engineering, Cairo University, Giza, Egypt

Abstract: Complicated interacting flow features such as shock-wave, boundary-layer and shock induced combustion are simulated numerically in the current study to investigate the effect of the transverse sonic fuel injection on the air-fuel mixing and flame stabilisation. The flow is modelled using the Reynolds-averaged Navier-stocks (RANS) equations, where chemical kinetics model is employed to compute the finite rates of chemical reactions. Turbulence is modelled using the Baldwin-Lomax algebraic model. Finite-volume scheme is applied where the convective fluxes are discretised by second order accurate Roe's scheme using MUSCL approach. Second order accurate Runge-Kutta method is used for the time-integration. Turbulent and chemically-reacting supersonic flow of hydrogen-air mixture over a ramp is simulated and the results show good agreement with the experimental data and the published numerical simulations. In addition, air-hydrogen flow is studied in a single strut scramjet engine, where mixing and flame holding processes are carried out using fuel transverse sonic injection.

Keywords: scramjet engines; computational fluid dynamics; CFD; chemically-reacting flows; Reynolds-averaged Navier-Stokes; RANS; turbulent flows; supersonic combustion; numerical simulation; transverse sonic fuel injection; shock wave; boundary layer; shock induced combustion; air-fuel mixing; flame stabilisation; kinetics modelling; chemical kinetics; turbulence modelling; finite volume; convective fluxes; supersonic flow.

DOI: 10.1504/IJESMS.2015.066132

International Journal of Engineering Systems Modelling and Simulation, 2015 Vol.7 No.1, pp.35 - 61

Received: 25 Mar 2013
Accepted: 22 Dec 2013
Published online: 24 Jan 2015 *

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