关键词: 固体推进剂火箭发动机;冷流试验;潜入式喷管;相似定律;模拟

Abstract: Cold-flow simulation test is an imPOrtant tool to stady the flow model in SRM.In this paper the development of cold-flow test technology of SRM are discribed and some similarity criterions are deduced by using the basical principles of similarity theory on steady uncompressible turbulent flow with mass add in the submerged section of SRM. According to the characteristic of the test it is suggested that CT can be used as an specified value to calculate other similarity constants.It is found that to simulate the actual firing condition is difficult in cold-flow test.The working process of SRM can be only simulated approximately in cold-flow test.In approximate simulation,Re criterion should be met to the greatest extent.

Key words: Solid propellant locket engine;Cold flow test;Insert nozzle;Similitude law;Simulation