吸气式发动机流道调节的影响

Influence of flowpath adjustment on air-breathing engine

随着吸气式发动机技术的发展,大包线飞行已成为基本要求,需要发动机采用流道调节技术以满足大包线范围内的高性能要求。另一方面,采用流道调节技术无疑又会带来系统复杂度的提升和结构尺寸/质量的增加,对发动机乃至飞行器的综合性能产生影响。为了进行流道调节影响分析,本文对以冲压发动机为动力的巡航导弹按假想飞行条件和不同流道参数条件进行了飞行器航程指标对比计算,对重要的结构质量环节进行了比较,结果表明调节系统附加结构质量对调节收益影响较大,超过一定的质量阀值后流道调节将失去意义。

With the development of the air-breathing engine, the large or broad flight envelope has become a basic requirement. Therefore, the flowpath adjustment technology is adopted for the engines to satisfy the requirement of higher performance. On the other hand, the flowpath adjustment technology will complicate the systems and make them heavier and bigger obviously. To analyze the affection of flowpath adjustment, the computation of the aircraft voyage index of cruise missile which takes a ramjet as its motive power was performed under the conditions of assumption flight and different flowpath parameters. The comparison show the extra mass caused by the adjustment technology takes an important part in the affection, and the adjustment will lose the importance as the mass value exceeds a certain range.