摘  要：针对研究喷管摆动工况下扩压器工作特性的试验中存在：喷管摆动难以实现；若以高温高压蒸汽或者燃气作为引射介质，虽引射效率高但耗费巨大的人力物力等问题在发动机研制初期很难被采纳。该文提出一种以扩压器摆动等效喷管摆动，以冷空气作为引射和被引射介质的简化试验方法。数值计算结果与试验结果符合较好，试验方法经济实用，操作简单，可以作为摆动喷管固体火箭发动机研制初期的试验手段。
关键词：固体火箭发动机；冷流缩比试验；喷管摆动；试验方法
中图分类号：V435+.6；TM930.12；V42；V435+.23       文献标志码：A      文章编号：1674-5124（2013）05-0039-03
Cold-flow testing of sub-scale model for swinging nozzle of solid-rocket engines
GUO Xiao-fan， YANG Xiao-hui， HE De-sheng， LI Guang-wu
（The 401th Research Institute of the Fourth Academy of CASC，Xi’an 710025，China）
Abstract: There are two questions in the characteristics test of diffuser with the swinging nozzle. Firstly， swinging nozzle is too difficult to achieve. Secondly， although the efficiency of ejector is high in the test which the ejector media is the steam or gas with high temperature and pressure， costly human and material resources are too hard to be adopted in the early development of the solid-rocket motor. To solve problems mentioned above， this paper presented a simplified test method that swinging diffuser is equivalent to swinging nozzle and cold air is used as the ejector media. The numerical results agree well with the available test data. The test method can be applied on the solid-rocket with swinging nozzle principle design because it is convenient， economical and practical.
Key words: solid-rocket engine； cold-flow testing of sub-scale model； swinging nozzle； test method