Abstract: A like doublet injector with 40°impingement angle was investigated Cold spray characteristics were tested using water, show good atomization quality and one peak mass distribution for this like doublet injector Spray angle for this like doublet injector was 26°～38°when the injector pressure drop was 1 35 MPa～1 75 MPa Hot tests using liquid oxygen were done for this pattern injector Cold and hot discharge coefficients were obtained statistically for the like doublet injector

Key words: Rocket propellant;Injector;Impinging injector;Propellant spray;Flow coefficient;Cold flow test;Hot firing test

摘要： 研究了一种 4 0°撞击角双股自击式喷嘴冷流特性和热试验流量系数。冷流试验以常温水为介质 ,用激光散射测粒仪和探针研究了该喷嘴的雾化质量和流强分布。在 1 35MPa～ 1 75MPa的喷嘴压降下该喷嘴椭圆形喷雾的喷雾锥角为 2 6°～ 38°,流强呈单峰型分布。统计研究了该喷嘴冷试验和在液氧介质下热试验时的喷嘴流量系数 ,流量系数在 0 6～ 0 8之间

关键词: 火箭推进剂;喷嘴;撞击式喷嘴;推进剂雾化;流量系数;冷流试验;热试车