小尺度空间内对撞射流雾化场特性实验研究

推进技术 ›› 2015, Vol. 36 ›› Issue (4): 595-600.

小尺度空间内对撞射流雾化场特性实验研究

刘焜¹,余永刚¹,赵娜²,王珊珊³

南京理工大学能源与动力工程学院，江苏南京 210094,南京理工大学能源与动力工程学院，江苏南京 210094,西北机电工程研究所，陕西咸阳 712099,中国舰船研究设计中心，湖北武汉 430064

发布日期:2021-08-15
作者简介:刘焜( 1984—)，男，博士生，研究领域为含能液体的喷雾燃烧。
基金资助:
教育部博士点基金资助项目( 20113219110024)。

Experimental Study on Spray Characteristic of Impinging Nozzle in Small Scale Chamber

School of Energy and Power Engineering，Nanjing University of Science and Technology，Nanjing 210094，China,School of Energy and Power Engineering，Nanjing University of Science and Technology，Nanjing 210094，China,Northwest Institute of Mechanical & Electrical Engineering，Xianyang 712099，China and China Ship Development and Design center，Wuhan 430064，China

Published:2021-08-15

摘要/Abstract

摘要： 为了研究小推力液体火箭发动机燃烧室的喷雾燃烧特性，设计了小尺度模拟燃烧室和对撞射流喷嘴，利用多普勒相位粒子动态分析仪( PDA)，观测了对撞射流在小尺度空间内的喷雾，重点观测了喷雾压力对于雾化特性参数的影响。实验结果表明:测量截面与喷嘴的距离越远，液滴平均直径越大，轴向速度越小；测量点到中心轴的距离越远，液滴轴向速度越小，径向速度波动越大；喷雾压力越大，液滴平均直径越小，轴向速度越大。由于受到壁面的影响，径向速度的周向分布在不同的喷雾压力下和测量点位置上的差异不明显；模拟燃烧室内液滴平均直径大于大气环境下的液滴平均直径，两者差值随着喷雾向下游发展而增大；模拟燃烧室对于液滴轴向速度影响较小，而对于液滴径向速度影响较明显。

关键词: 撞击式喷嘴；雾化；液滴；小尺度空间；周向分布

Abstract: To investigate the spray characteristic in the combustion chamber of the low thrust liquid rocket engine，the small scale simulation chamber and the impinging nozzle were designed. The impinging spray was ob.served with the PDA system. The effects of the pressure on the spray parameters were analyzed emphatically. Theresults indicate that，the further away from the nozzle，the larger the mean diameter of the droplets is and the lowerthe axial velocity is. The further the measuring point from the center axis is，the smaller the axial velocity of thedroplets is and the more the fluctuation of the radial velocity is. The greater the nozzle pressure is，the smaller the mean diameter of the droplets is and the higher the axial velocity is. Under the influence of the chamber wall，the effects of the spray pressure and the measuring point location on the circumferential distributions of the radial ve.locity are not obvious. The mean diameter of the droplets in the simulation chamber is larger than that in atmo.sphere environment，and the difference increases as the spray develops downstream. The simulation chamber af.fects the axial velocity of the droplets slightly，but the radial velocity seriously.

Key words: Impinging nozzle；Spray；Droplet；Small scale space；Circumferential distributions

刘焜,余永刚,赵娜,王珊珊. 小尺度空间内对撞射流雾化场特性实验研究[J]. 推进技术, 2015, 36(4): 595-600.

LIU Kun¹,YU Yong-gang¹,ZHAO Na²,WANG Shan-shan³. Experimental Study on Spray Characteristic of Impinging Nozzle in Small Scale Chamber[J]. Journal of Propulsion Technology, 2015, 36(4): 595-600.

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