Flow Analysis of Scramjet Engine Combustor with Three Stream Model

Abstract

Three Stream Model is applied to the flow in the scramjet combustor. Separate temperatures are assigned to the hydrogen, the air and the ignition source material. A mixing routine is included in the model which allows the unmixed fuel and air to be mixed at a prescribed schedule along the combustor. The area profile along the flow direction is used as a design parameter and is optimized by the multiplier method. A wall friction factor and a heat transfer coefficient can be calculated by the van Driest turbulence model. Therefore, the effect of heat recovery from engine wall by fuel hydrogen is made clear. The fuel injection momentum is also taken into consideration.