阐述了压力输水管道高点排气与虹吸利用的矛盾关系，并列举了排气问题的解决措施，提出以采用安全阀的组合排气装置解决该问题。
The solving measures for exhaust problem are listed, and the combined exhaust device using safety valve is put forward to solve this problem.
从理论上证明：对这两类发动机的两相喷管流动特性可以通过一个共同的组合参数——当量排气速度来进行分析；
Theoretically, it is proved that for both these engines, the properties of two-phase flow in nozzle can be analysed with a common combined parameter which is equivalent to exhaust velocity.
根据特种发动机排气噪声的特性和消声器的安装要求，设计了一个组合式排气消声器。
According to the exhaust noise characteristics of special engine and the installation request of exhaust muffler, the exhaust muffler for special engine was designed.
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