Virtual Experiment for Optimization of Fuel Distribution in a Scramjet Engine

Japan Aerospace Exploration Agency (JAXA) has been investigating scramjet engines in Kakuda Space Center using RamJet Engine Test Facility (RJTF) et al. The engine tested at the flight condition of Mach 6 showed very steep fuel distribution. The authors are researching the influence of shock wave from strut-cowl system on the fuel distribution by using CFD based on RJTF tests, and have found advantages of strut in the engine. Here describe the authors the result of virtual experiments for optimization trial of fuel distribution in the engine by means of tracing back along streamlines in the view point where to set the fuel injection positions in order to let the fuel go into high mass flux area in the engine.