RESEARCH ON EJECTOR-JET MODE OF ROCKET-RAMJET COMBINED CYCLE ENGINE

摘要

This paper presents an overview of the research activities on ejector-jet mode of rocket-based combined cycle engine. At launch, the engine produces the power by specially designed rockets placed upstream of a ramjet combustor and gains even more power with secondary combustion with induced air flow. An engine model, embedding twin rocket chamber on the top wall side of a scramjet flow-pass, was fabricated and was tested in its ejector-jet mode operation under sea-level static air conditions and Mach 4 flight conditions. In order to obtain experimental data in low speed flight conditions, subsonic flight experiments were conducted using small hybrid rocket. The experimental vehicles, ejector-duct were attached to the rocket engine, were launched and obtained pressure distribution in the ejector-duct.