Research Activities of Advanced Propulsion Technology in JAXA

Abstract

The rocket-ramjet combined-cycle engine is studied for the next space transportation in JAXA. The engine realizes a higher effective specific impulse than that of the conventional rocket engines. Engine model combustion tests were conducted in the ejector-jet mode at a sea-level static-air condition and in the ramjet mode at a Mach 4 flight condition. Flight tests with the CAMUI hybrid rocket are planed for the ejector-jet system design technology. Aerodynamic tests and combustor tests are conducted to modify the engine design technologies. Studies on the high enthalpy flow, the light weight material and the vitiation effect on the engine performances are also conducted.