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超音速燃烧冲压发动机的设计与性能估算,关键取决于发动机各部件的几何形状和效率。因此,为了获得可信的结构,必须通晓所有可用的试验数据和已经建立的理论模型。本文的目的是重申在技术文献中已建立和证实的部件几何形状、长度、内流损失和燃烧动力学的标准,并说明发动机性能随这些标准偏差的变化关系。文中介绍了一种典型的发动机结构用以说明这些影响。结果表明,如果采用类似普通亚音速燃烧冲压发动机设计中所用的那种更为理想的假设条件,预估净推力的最大值约高达45％。
The design and performance evaluation of a supersonic combustion ramjet engine depends crucially on the geometry and efficiency of the engine components. Therefore, in order to obtain a credible structure, all available experimental data and the established theoretical models must be known. The purpose of this paper is to reiterate the established and validated standards for component geometry, length, influx loss, and combustion dynamics in the technical literature and to illustrate how engine performance varies with these standard deviations. This article describes a typical engine structure to illustrate these effects. The results show that the net thrust is estimated to be as high as about 45% assuming the more ideal assumptions used in common subsonic combustion engine designs.