Modeling the characteristic types and heat release of stretched premixed impinging flames

A numerical code has been developed for the simulation of the impingement o f a turbulent jet on a plane surface. The performance of three turbulence m odels is assessed under isothermal conditions. Predictions are compared wit h experimental data from the literature. Based on the results an appropriat e turbulence model is selected to model a premixed jet flame impinging on a solid surface. Mass transfer and combustion are modeled with a two-equatio n model simulating volumetric and kinetically controlled chemical reaction rates. Modeling of heat transfer accounts for convection and radiation effe cts. Results show that under high pressure environment turbulent premixed f lames are of wrinkled-thickened type near the outlet of the nozzle (free je t region) and of wrinkled reaction sheets in the area near the surface (imp ingement region and radial wall jet). The results establish that appropriat e choice of turbulence and combustion models can lead to accurate predictio n of the flow characteristics.