DESIGN OF SUB-SCALE ROCKET-RAMJET COMBINED CYCLE ENGINE MODEL

摘要

A sub-scale rocket-ramjet combined cycle engine model was designed, which will be tested at the Ramjet Engine Test Facility under a sea-level static, Mach 4, 6 and 8 flight conditions. The engine operates in the ejector-jet, ramjet, scramjet and rocket modes. The engine model has two H_2-O_2 rockets in the duct. Fuel injectors are equipped for the secondary combustion in the downstream straight duct section. Each component of the engine was examined experimentally and physical models were constructed. The engine model is 3 m long, 0.2 m high and its width is 0.22 m at the entrance. Pressure level in the rocket chamber is 3 MPa, and net thrust is 4 kN under the sea-level static, design condition.