射流偏心撞击对凝胶推进剂撞击雾化影响的实验研究

发布时间：2018-02-26 03:35

本文关键词： 兵器科学与技术凝胶推进剂撞击雾化偏心撞击液膜液滴尺寸　出处：《兵工学报》2016年04期 　论文类型：期刊论文

【摘要】：为研究射流偏心撞击对凝胶撞击雾化的影响,建立撞击雾化实验台,制备凝胶推进剂及其模拟液,对单股射流形态及不同偏心度下的撞击液膜和液滴尺寸分布进行测量。理论推导了偏心撞击下撞击液膜偏角,并与实验结果进行了对比。研究表明:随着喷射速度的增大,单股射流受到的扰动逐渐增大;在靠近喷注器出口处扰动有限,不同速度下的射流变形都很小;不同偏心度下液膜发展和破碎形式基本相同,当偏心度达到1.5/6时,液膜自撞击点开始出现了呈一定角度较为暗淡的区域,流量不对称性增强;随着偏心度的增大,液膜偏角逐渐增大,但与理论值相比偏小;偏心度的大小对撞击雾化的液滴尺寸分布影响较小,但偏心撞击的索特平均直径值比无偏心时小,并在0.5/6达到最小值。
[Abstract]:In order to study the effect of jet eccentricity impingement on gel impact atomization, an impingement atomization test bench was established to prepare gel propellant and its simulation liquid. The shape of single jet and the size distribution of impingement liquid film and droplet under different eccentricity were measured. The deflection angle of impingement liquid film under eccentric impact was deduced theoretically and compared with the experimental results. The disturbance of single jet is gradually increasing; the disturbance is limited near the exit of injector, and the deformation of jet is very small at different velocities; the development and breakage of liquid film is basically the same at different eccentricity, when the eccentricity reaches 1.5 / 6, From the point of impact, the liquid film appears a dim area at a certain angle, and the flow asymmetry increases, and with the increase of eccentricity, the deflection angle of the liquid film increases gradually, but it is smaller than the theoretical value. The influence of eccentricity on droplet size distribution is small, but the average diameter of droplet in eccentric impact is smaller than that without eccentricity, and it reaches the minimum value at 0.5 / 6.
【作者单位】：南京理工大学机械工程学院;山西北方兴安化学工业有限公司;
【基金】：中国航天科技集团公司航天科技创新基金项目(CASC03-02) 中央高校基本科研业务费专项基金项目(30920140112001)
【分类号】：V51

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