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

作　　者：张波涛 王凯 李平 杨岸龙 ZHANG Botao;WANG Kai;LI Ping;YANG Anlong(Key Laboratory for Liquid Rocket Engine Technology,Xi'an Aerospace Propulsion Institute,Xi'an 710100,China;Academy of Aerospace Propulsion Technology,Xi'an 710100,China)

机构地区：[1]西安航天动力研究所液体火箭发动机技术重点实验室,陕西西安710100 [2]航天推进技术研究院,陕西西安710100

出　　处：《火箭推进》2023年第6期1-9,共9页Journal of Rocket Propulsion

基　　金：国家重点基础研究发展计划(613193)。

摘　　要：目前针栓喷注器中心推进剂的喷注形式多采用离散的槽型结构,径向槽布局方式对雾场结构起到了决定性的作用。为了获得气液针栓喷注器雾化角的预测公式,基于控制体分析从动量定理推导出了喷注单元的雾化角理论公式,并通过试验结果修正理论公式得到了动量系数。对于多喷注单元针栓喷注器的雾化角,采用试验结果对喷注单元雾化角的理论模型进行修正,掌握了径向槽布局方式和阻塞率对雾化角的影响规律。结果表明:雾化角的理论预估值与试验值吻合较好;在总流通面积和质量流量一定时,径向槽布局方式对雾化角影响很小;局部动量比和阻塞率对雾化角起决定性作用,当阻塞率不大于14.55时,相邻喷注单元之间的相互作用影响很小,多喷注单元气液针栓喷注器的雾化角与喷注单元的雾化角近似,当阻塞率不小于25.46时,雾化角理论公式中的动量系数推荐值为0.87。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 

分 类 号：V434.3[航空宇航科学与技术—航空宇航推进理论与工程]