三组元喷嘴混合特性的试验研究

本文对四种类型的气氢／液氧／煤油三组元喷嘴进行了混合特性试验， 研究了内喷嘴的缩进长度对同轴离心外混式喷嘴混合特性的影响， 对比了相同的三组元工况下各喷嘴的混合特性， 分析了喷嘴结构对混合特性的影响， 进行了单喷嘴和三喷嘴的混合特性试验， 试验结果表明： 在相同的三组元工况下， 同轴直流式喷嘴的流强分布跨度比同轴离心式喷嘴小。所得结论对三组元喷嘴和气液同轴式喷嘴的优化设计有参考价值。

Experimental Investigation on Mixing Characteristics of Tripropellant Injectors

Four types of GH 2/LO 2/RP-1 tripropellant injectors are employed to present the mixing characteristics test in this paper. The effects of the internal injector's recess on the mixing characteristics of the swirl coaxial injector with separate fuel injection are studied. The mixing characteristics of each injector are compared with those of the others in the same tripropellant operating condition. The effects of the injectors' configuration on the mixing characteristics are analyzed. The mixing characteristics tests of the single injector and three injectors are presented. The tests results show that the span of the mass flux distribution of the shear coaxial injector is smaller than that of the swirl coaxial injector in the same tripropellant operating condition. The conclusions reached in this paper provide a reference for the optimization design of the tripropellant injectors and the gas/liquid coaxial injectors.