火箭推进2023，Vol.49Issue(6)：1-9,9.
径向槽布局方式对针栓喷注器雾化角的影响
Effect of radial slots layout on spray angle for gas-liquid pintle injector
摘要
Abstract
In present,the injection form of the center propellant in pintle injector is mostly discrete slot,and radial slots layout plays a decisive role in the spray structure.In order to obtain the spray angle formula of gas-liquid pintle injectors,a spray angle prediction formula of injector unit was deduced from the momentum conservation based on the control volume.The momentum coefficient was derived from the experimental results to modify the theoretical formula.For the spray angle of pintle multi-injectors,the experimental results were used to modify the theoretical model of injector unit spray angle and the effect of radial slots layout and blocking rate on spray angle was mastered.The results show that the theoretical value of spray angle is in good agreement with the experimental value.Under the constant total injection area and mass flow rate,the radial slots layout has little effect on the spray angle.The spray angle is determined by the local momentum ratio and blocking rate.When blocking rate is not more than 14.55％,the interaction between adjacent injection units is minimal,and the spray angle of gas-liquid pintle multi-injectors is approximate to the spray angle of gas-liquid pintle injector unit.When blocking rate is not less than 25.46％,the recommended value of momentum coefficient in the theoretical formula of spray angle is 0.87.关键词
气液针栓喷注器/雾化角/径向槽/阻塞率Key words
gas-liquid pintle injector/spray angle/radial slot/blocking rate分类
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张波涛,王凯,李平,杨岸龙..径向槽布局方式对针栓喷注器雾化角的影响[J].火箭推进,2023,49(6):1-9,9.基金项目
国家重点基础研究发展计划(613193) （613193）
