中文摘要：

为了能够方便快捷地对塞式喷管发动机的性能做出准确的预示,通过理论分析,结合塞式喷管的流场特征,提出了一种塞式喷管壁面压强分布的数学模型。在此基础上,分别建立了全长型和截短型的塞式喷管的推力模型。通过与实验的对比分析,模型与实验数据基本吻合,验证了塞式壁面压力分布的数学模型以及在此基础上建立的推力模型,可以作为塞式喷管发动机性能预示的有效工具。

英文摘要：

In order to obtain the thrust performances of plug nozzles rapidly and correctly, a mathematical model of the pressure distribution on plug wall is established by theoretical analysis with combination of the flow phenomena in plug nozzles. Based on the mathematical model, thrust models for the plug nozzle with full length and truncated central body are established. Through comparison and analysis, the results got from the model are quite consistent with experiment results, implying that the mathematical model of pressure distribution and the thrust models are effective and can work as effective tools in the performance evaluation of plug nozzles.