阻塞率对液液针栓多喷注单元喷雾场特性的影响  

Effect of blockage rate on spray characteristics of liquid-liquid pintle multi-injector elements

作　　者：王凯 唐亮 雷凡培 杨岸龙 周立新 WANG Kai;TANG Liang;LEI Fanpei;YANG Anlong;ZHOU Lixin(National Key Laboratory of Science and Technology on Liquid Rocket Engines,Xi'an Aerospace Propulsion Institute,China Aerospace Science and Technology Corporation,Xi'an 710100,China;China State Shipbuilding Corporation Limited,Beijing 100044,China)

机构地区：[1]中国航天科技集团有限公司西安航天动力研究所液体火箭发动机技术重点实验室,西安710100 [2]中国船舶集团有限公司,北京100044

出　　处：《航空动力学报》2024年第7期250-262,共13页Journal of Aerospace Power

基　　金：国家自然科学基金(11502186)。

摘　　要：为了研究阻塞率对针栓式喷注器喷雾场特性的影响,基于平面针栓喷注单元的研究思路,设计了结构可更换的平面针栓多喷注单元试验件,同时采用分相识别的PLIC VOF(piecewise linear interface calcula-tion volume of fluid)多相流仿真方法及高速摄影试验方法,开展了阻塞率对液液针栓多喷注单元的雾化角、喷雾扩散角及液雾空间分布的影响规律研究.对于径向圆孔,阻塞率的改变通过改变径向孔直径及个数实现;对于径向矩形孔,阻塞率的改变还可以通过改变矩形的高宽比实现.研究发现:阻塞率对喷雾场的液雾空间分布有重要影响.在径向喷注孔总动量比不变时,阻塞率对喷雾场的影响主要通过喷雾扇空间间距的直接影响和转化为有效动量比的间接影响两种途径实现,径向孔形状对喷雾场的影响本质上也转化为阻塞率及有效动量比的影响.径向孔直径改变和形状改变造成的阻塞率变化对雾化角的影响仅通过有效动量比间接实现,喷注单元的雾化角理论模型也适用于多喷注单元;阻塞率对喷雾扩散角和液雾空间分布的影响则通过两种途径共同产生.另外,高的总动量比工况下,液雾径向分布范围会增大,相邻单元间相互作用会使得雾扇中心区和外侧区液雾分布量均增加.In order to study the influence of blockage rate on the spray characteristics of pintle injector,based on the design idea of a plane pintle injector element,the test parts of the plane pintle multi-injector elements with replaceable components were designed.At the same time,PLIC VOF(piecewise linear interface calculation volume of fluid)multiphase flow simulation method with each phase individually identified and the high-speed photography test method were used to study the influence of blockage rate on the spray angle,spray diffusion angle and spatial distribution of liquid spray in the liquid-liquid pintle multi-injector elements.For the multi-pintle injector element with radial circular orifices,the blockage rate was changed by changing the diameter and the number of radial orifices.For the multi-pintle injector element with radial rectangular orifices,the blockage rate was also changed by changing the rectangular aspect ratio of radial orifices.It was found that the blockage rate had important effect on the spray concentration spatial distribution of spray field.When the total momentum ratio remained unchanged,the effect of blockage rate on the spray field was directly produced by the spatial distance between the adjacent spray fans,and also indirectly produced by the effective momentum ratio on the other hand.The influence of radial orifice shape on the spray field was also essentially transformed into the influence of the blockage rate and effective momentum ratio.The influence of the blockage rate change on the spray angle was only indirectly realized by the effective momentum ratio,which was caused by the change of radial orifice diameter and shape.The spray angle theoretical model of pintle injector element was also applicable to multi-pinlte injector element.Meanwhile,the influence of the blockage rate on the spray diffusion angle and the spray concentration spatial distribution was achieved through two action ways.In addition,the spray radial distribution range increased under the condition of high tot

关 键 词：液液针栓喷注器 阻塞率 有效动量比 径向孔形状 雾化角 液雾分布 

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]