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3 堵盖设计问题整体式冲压发动机燃烧室具有双重功能,当助推器工作时,燃烧室压力高,前端需用堵盖密封进气道与燃烧室界面,以防止高压燃气沿进气道逆流;而当冲压发动机工作时,进气道堵盖应及时打开,以便让空气流入燃烧室。堵盖是整体式冲压发动机关键部件之一,其设计要求如下: 1) 在环境温度为—54～74℃、压力为14MPa情况下,必须保证燃烧室和进气道之间界面的密封;
3 cover design issues Integral ramjet engine combustion chamber has a dual function, when the booster work, the combustion chamber pressure is high, the front end of the need to seal the inlet and the combustion chamber seal to prevent high-pressure gas countercurrent along the inlet port ; And when the ramjet engine work, inlet blocking should be opened in time to allow air to flow into the combustion chamber. Plug cover is one of the key components of the integrated ramjet engine. The design requirements are as follows: 1) In the case of ambient temperature of -54 ~ 74 ℃ and pressure of 14MPa, the seal of the interface between the combustion chamber and the air inlet must be ensured;