Numerical simulation of high-speed turbulent reacting coaxial jet flow using a structured grid

Reacting flowfields are described by compressible turbulent Reynolds-averag ed Navier-Stokes equations augmented with appropriate species continuity eq uations that provide for the convection, diffusion and production of each c hemical species. The closure of the system of equations is achieved using a two-equation turbulence model. A single-step overall fast chemical reactio n combustion model based on the eddy break-up concept is employed for the t urbulence-chemistry interaction. A finite volume discretization is carried out in spatial coordinates to compute inviscid and viscous flux vectors. A multistage Runge-Kutta time-stepping scheme is used to obtain a steady stat e solution. The numerical algorithm is developed by taking into considerati on the structured grid arrangement for a turbulent chemically reacting coax ial jet. The numerical scheme is shown to be computationally fast, easy to program and efficient. A supersonic diffusion flame is analysed and the res ults are compared with the available experimental data.