高度补偿喷管的氢氧热试研究

采用气氧作氧化剂、气氢作燃料, 对具有高度补偿特性的塞式喷管和双钟型喷管进行了点火热试.介绍了气氢/气氧试验系统, 以及试验喷管的结构形式、设计参数和装配照片, 喷管试验件采用耐烧蚀的钨渗铜材料加工, 成功进行了多次短时间点火热试.给出了试验测量参数曲线、点火热试照片和数据结果, 获得了不同高度下塞式喷管和双钟型喷管的热试性能数据, 和当量钟型喷管相比两者都具有较好的高度补偿特性.以推力系数效率为例, 塞式喷管在低空压强比下达到92%-95%, 双钟型喷管低空下为96%-98%, 高空下则都在95%左右. 

Hydrogen/oxygen hot-firing tests of altitude compensating nozzles

By employing the gaseous oxygen as oxidizer and gaseous hydrogen as fuel,hot-firing tests were performed for aerospike nozzle and dual-bell nozzle test engines with altitude compensating features.The gaseous hydrogen/oxygen experimental system,the test nozzles' configuration,design parameters and assembly graphics were described.Made of the ablation-resistant tungsten-copper alloy,the test components of nozzles have successfully passed several short-period hot-firing tests.The measured parameter curves,test photographs and results are obtained,thus obtaining the performance data of aerospike nozzle and dual-bell nozzle under different altitudes,both of which have good altitude compensation characteristic as compared with the conventional bell nozzle.For example,the thrust coefficient efficiency of aerospike nozzle is 92%-95% and dual-bell nozzle is 96%-98% at low altitude,and about 95% at high altitude.