System Analysis and Trajectory Optimization of an Ejector-Ramjet Powered Reusable Launch Vehicle

The ejector ramjet, one kind of rocket-based combined cycle propulsion, has received increasing attention lately as a potential solution for reusable air-breathing space transportation systems. This paper discusses a system study of an ejector ramjet and presents a method for the optimization of the trajectory and engine parameters. Due to the potentially large number of input parameters and their sensitivities on the overall system performance, a hybrid genetic algorithm was chosen for the optimization.