关键词: 火箭冲压发动机;点火;振动;防热

Abstract: The integrated ramjet which consists of a liquid fuel ramjet and a solid fuel booster is a new type of engine.It is the best choice for the propulsion system of supersonic, small volume, medium-and long-range missile.The integrated ramjet has Wide field of application and is drawing attention from the world.In recent years, China has advanced greatly in the key technology of integrated ramjet. Since the liquid fuel ramjet and the booster share the same combstor,neither mechani cal flame-holder nor air film cooling structure can be installed in the combustor.This causes some difficulty in design of ignition,combustion oscillation reduction and themal protection,However test results show :several methods can be used for solving the problem of ignition,and one of the keys is to meet the flame stability criteria.The flow field of combustor inlet,and the fuel distribution, etc.have a great effect on the combustion oscillation. The computation results also show: during flight, the high velosity airstream outside the wall of combustor can greatly reduce the temperature of the combustor wall,and as a result the challenge for thermal protection struction with the same cooling effect is reduc-ed.

Key words: Rocket ramjet;Ignition;Vibration;Heat protection