射流偏心撞击对凝胶推进剂撞击雾化影响的实验研究

doi:10.3969/j.issn.1000-1093.2016.04.006

兵工学报 ›› 2016, Vol. 37 ›› Issue (4): 612-620.doi: 10.3969/j.issn.1000-1093.2016.04.006

射流偏心撞击对凝胶推进剂撞击雾化影响的实验研究

邓寒玉¹，封锋¹，武晓松¹，余兴飞¹，左英英²

（1.南京理工大学机械工程学院，江苏南京 210094; 2.山西北方兴安化学工业有限公司，山西太原 030008）

收稿日期:2015-07-02 修回日期:2015-07-02 上线日期:2016-06-20
作者简介:邓寒玉(1988—)男博士研究生
基金资助:
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)

Experimental Research on the Effect of Eccentric Impact of Jet on the Impinging Atomization of Gel Propellant

DENG Han-yu¹， FENG Feng¹， WU Xiao-song¹， YU Xing-fei¹， ZUO Ying-ying²

（1.School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China;2.Shanxi North Xingan Chemical Indutry Co., Ltd., Tianyuan 030008, Shanxi, China）

Received:2015-07-02 Revised:2015-07-02 Online:2016-06-20

摘要/Abstract

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。

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

Abstract: In order to study the effect of eccentric impact of jet on the impinging atomization of gel propellant, a relative experimental system is established, and a gel propellant as well as a simulant are prepared. Jet behavior, impinging liquid sheet and droplet size distribution at different eccentricities are measured. Spray incline angle is deduced theoretically and compared to the experimental results under eccentric impingement. The results indicate that the disturbances on jets are strengthened with increase in jet velocity. However, the deformations of the jets near injectors are all very small at different jet velocities since the disturbance is limited. The development and breakup of liquid sheet are basically the same under different eccentricities. While the eccentricity exceeds 1.5/6, two darker regions with a certain angle appear at the impinging point, resulting in the enhancement of flux nonsymmetry. As the eccentricity is improved, the spray incline angle enlarges and is less than the theoretical result. The eccentricity has a little influence on the droplet size distribution of impinging atomization, but Sauter mean diameter (SMD) with eccentricity is always lower than that without eccentricity. And SMD reaches the smallest when the eccentricity equals to 0.5/6.

Key words: ordnance science and technology, gel propellant, impinging atomization, eccentricity, sheet, droplet size

中图分类号:

V513

邓寒玉，封锋，武晓松，余兴飞，左英英. 射流偏心撞击对凝胶推进剂撞击雾化影响的实验研究[J]. 兵工学报, 2016, 37(4): 612-620.

DENG Han-yu， FENG Feng， WU Xiao-song， YU Xing-fei， ZUO Ying-ying. Experimental Research on the Effect of Eccentric Impact of Jet on the Impinging Atomization of Gel Propellant[J]. Acta Armamentarii, 2016, 37(4): 612-620.

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射流偏心撞击对凝胶推进剂撞击雾化影响的实验研究

Experimental Research on the Effect of Eccentric Impact of Jet on the Impinging Atomization of Gel Propellant

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