液氧煤油发动机蒸发器路单向阀结构优化

Structure optimization of check valve in evaporator pipeline of LOX/kerosene engine

在某次液氧煤油发动机试车中,由于蒸发器路单向阀调整流量小于设计流量,导致单向阀阀芯发生颤振,从而在发生器氧系统引入激励源,引起发生器供应系统的耦合振荡,发动机结构振动大幅增加,导致试车中止。根据发动机使用要求,对单向阀结构进行了结构优化。通过AMEsim软件对优化后单向阀进行的仿真分析及试验验证,表明优化措施有效。优化后单向阀参加发动机热试考核,工作正常。

The check valve at the evaporator pipeline oscillated in a test of LOX/kerosene engine because the flux of the pipeline was less than that of its design requirement. The oscillation of the valve brought an excitation to the LOX system of the generator, then resonance arose, which caused the acute engine oscillation and the test had to be cut off. The configuration of the check valve was improved to meet the system. Emulation and experimental verification of the optimized check valve were taken with AMEsim. The results indicate that the measure is effective. The optimized check valve worked normally in a test of LOX/kerosene engine.