攻角变化对液体冲压发动机性能影响分析

Analysis of Influence of Angle of Attack Change on Performance of Liquid Ramjet Engine

针对液体冲压发动机在导弹大攻角状态下工作不稳定的问题,通过地面风洞试验分析攻角变化对 X 形布局二元进气道性能的影响,并结合液体冲压发动机的结构和工作过程,对进气道引发亚临界后发动机供油情况以及冷却系统性能影响进行分析。结果表明:攻角变化对液体冲压发动机性能产生不同程度的影响,大攻角状态下进气道性能会快速下降,引发进气道亚临界状态,并对发动机供油以及发动机冷却系统产生影响。研究结果可为液体冲压发动机的试验鉴定提供参考。

Aimed at the problem of liquid ramjet engine work instability when missile is under the condition of large angle of attack, the performance of“X”type inlet is analyzed by the ground wind tunnel experiments when angle of attack is changed, and combined with structure and wording process of the liquid ramjet engine, the oil supply and the cooling system performance of liquid ramjet engine is analyzed. The results show that the change of angle of attack has different influence on the performance of the liquid ramjet engine, performance of the inlet is rapidly degraded under the condition of large angle of attack, inlet subcritical condition is raised, and the oil supply and the cooling system performance of liquid ramjet engine is affected. The research results can provide reference for test and identification of liquid ramjet engine.