Abstract: To evaluate altitude compensation characteristic of aerospike nozzle reasonably, cold flow experimental study on three aerospike nozzles and the bell nozzle was carried out, using air as working medium. Three methods for the efficiency calculation of nozzles were shown, and the test results of two different kinds of nozzles were dealt with using this methods. Also three kinds of performance curves were obtained and efficiencies of two kinds of nozzles at different altitudes were analyzed. Compared with the test bell nozzle, the test aerospike nozzles had altitude compensation characteristic. Different aspects of nozzle performance are compared using different methods, so it can be taken in account synthetically to evaluating nozzle performance.

Key words: Plug nozzle;Bell nozzle;Nozzle efficiency;Research test;Performance analysis

摘要： 为了合理地评价塞式喷管是否具有高度补偿特性,利用空气作为工作介质,对实验塞式喷管和钟型喷管进行了冷流比较实验研究。三种不同的喷管效率计算方法对两种喷管的实验结果进行了处理,得到不同的性能曲线,分析比较两种喷管在不同高度下的效率。与当量实验钟型喷管相比,实验塞式喷管具有高度补偿特性,算法一和算法二分别比较了喷管性能的不同方面,评价喷管性能时可以综合考虑。

关键词: 塞式喷管;钟形喷管;喷管效率;研制试验;性能分析