Consideration for Optimization of Fuel Distribution in a Scramjet Engine

Japan Aerospace Exploration Agency (JAXA) has been investigating scramjet engines and others in Kakuda Space Center using Ram Jet Engine Test Facility (RJTF) et al. The engine tested at the flight condition of Mach 6 in RJTF showed very important characteristics depending on internal geometry. The engine tested at the flight condition of Mach 6 showed very steep fuel distribution. The authors are researching the influence of cowl shock wave on the fuel distribution. CFD is carried out to solve the inner air flow, and the two configurations are compared in the view point of scramjet engine performance. Being based on the aerodynamic effect of strut found in the research, the strut fuel injection is proposed in order to improve the fuel distribution in the engine.