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针栓式喷注器锥形液膜破碎特性试验
引用本文:方昕昕,沈赤兵,张新桥. 针栓式喷注器锥形液膜破碎特性试验[J]. 航空动力学报, 2016, 31(12): 3004-3009. DOI: 10.13224/j.cnki.jasp.2016.12.024
作者姓名:方昕昕  沈赤兵  张新桥
作者单位:1. 国防科学技术大学 航天科学与工程学院, 长沙 410073;
基金项目:国防科学技术大学优秀研究生创新资助项目(S150105)
摘    要:采用高速摄影获得了针栓式喷注器在不同喷注压降和结构参数下的表面波破碎图像,测量了锥形液膜的破碎长度和破碎时间,研究了变工况时液膜破碎长度和破碎时间的变化规律.试验结果表明:在喷注压降不变的条件下,针栓式喷注器能够实现流量的线性调节.针栓式喷注器设计时,在合理的推进剂动量比范围内,狭缝宽度应尽量取小.液膜在低工况时破碎得更快.液膜破碎长度和破碎时间均随喷注压降的增加而减小. 

关 键 词:变推力火箭发动机   针栓式喷注器   锥形液膜   破碎长度   破碎时间
收稿时间:2015-07-03

Experiment of breakup characteristics on conical sheets of pintle injectors
FANG Xin-xin,SHEN Chi-bing and ZHANG Xin-qiao. Experiment of breakup characteristics on conical sheets of pintle injectors[J]. Journal of Aerospace Power, 2016, 31(12): 3004-3009. DOI: 10.13224/j.cnki.jasp.2016.12.024
Authors:FANG Xin-xin  SHEN Chi-bing  ZHANG Xin-qiao
Affiliation:1. College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China;2. Science and Technology on Scramjet Laboratory, National University of Defense Technology, Changsha 410073, China
Abstract:The fragmenting images of surface wave of a pintle injector in different injection pressure drops and structural parameters were obtained using high-speed photography, and the breakup length and breakup time of the conical sheets were measured. Moreover, the variations of the breakup length and breakup time in different operating conditions of the pintle injector were analyzed. According to the experimental results, the mass flow rate of the pintle injector can achieve linear variation in the condition of constant injection pressure drop. When designing a pintle injector, the slit width should be chosen as small as possible within the reasonable range of momentum ratio of propellants. The conical sheets breakup more quickly in the low working condition. In addition, both of the breakup length and breakup time of the conical sheets reduce along with increase of injection pressure drop.
Keywords:variable thrust rocket engine  pintle injector  conical sheets  breakup length  breakup time
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