凝胶推进剂模拟液撞击雾化特性研究

doi:10.13675/j.cnki. tjjs. 025

推进技术 ›› 2019, Vol. 40 ›› Issue (12): 2861-2871.DOI: 10.13675/j.cnki. tjjs. 025

凝胶推进剂模拟液撞击雾化特性研究

张伟^1,2,郑寅^1,2

1.北京航天试验技术研究所，北京 100074;2.北京市航天动力试验技术与装备工程技术研究中心，北京;100074

发布日期:2021-08-15

Analysis on Atomization Characteristics of Gelled Propellant Simulants Impinging Jets

1.Beijing Institute of Aerospace Testing Technology,Beijing 100074，China;2.Beijing Engineering Research Center of Aerospace Propulsion Testing Technology and Equipment,Beijing 100074,China

Published:2021-08-15

摘要/Abstract

摘要： 为了寻求凝胶推进剂雾化机理、提高其雾化效果，开展幂律流体双股圆柱射流撞击的理论和实验研究。首先推导了幂律型流体射流撞击形成液膜的理论模型，在其中引入粘性力和能量损失。进而通过设计凝胶模拟液射流撞击实验，使用高速摄像机拍摄图像的方法进行了相关的实验研究，以验证理论的正确性。在此基础上，对撞击角度、射流速度分布及液体部分物性参数对液膜形状、厚度及速度分布的影响进行了分析，得到了相关参数的影响规律。研究结果表明，射流撞击角、速度型、液体表面张力系数、流变特性等均对液膜特性有明显影响，且流体本身的物理性质对撞击形成的液膜的影响更甚。

关键词: 凝胶推进剂;模拟液;雾化;射流撞击;喷嘴;幂律流体

Abstract: To find the atomization mechanism and improve its atomization effect of gelled propellant, a research of two equal-cylinder jets impingement system for power-law liquid is conducted. The research adopts the method of theoretical deduction and experimental verification. An improved theoretical model for power-law liquid is deduced, in which the energy dissipation and viscosity force are introduced. By using the method of high-speed camera to take images，several experiments of gelled propellant simulants with different viscosity have been performed to verify the model. Based on this model, the effects of the jets liquid physical properties, impingement angle and velocity profile on sheet shape, size, velocity and thickness distribution are analyzed. The theoretical results show that the impingement angle, jet velocity profile, surface tension and rheological parameters all affect the identity of liquid sheet, and the physical properties of the fluid itself have more influence on the liquid sheet formed by jets impingement.

Key words: Gelled propellant;Propellant simulants;Atomization;Liquid jet impingement;Injector;Power-law liquid

张伟,郑寅. 凝胶推进剂模拟液撞击雾化特性研究[J]. 推进技术, 2019, 40(12): 2861-2871.

ZHANG Wei^1,2,ZHENG Yin^1,2. Analysis on Atomization Characteristics of Gelled Propellant Simulants Impinging Jets[J]. Journal of Propulsion Technology, 2019, 40(12): 2861-2871.

参考文献

[1] Rahimi S , Hasan D ， Peretz A . Development of Laboratory-Scale Gel Propulsion Technology[J]. Journal of Propulsion and Power， 2004， 20(1): 93-100.
[2] 蔡锋娟，张蒙正 . 凝胶推进剂雾化研究现状及问题[J]. 火箭推进， 2010， 36(4): 24-30.
[3] Dombrowski N ， Fraser R P . A Photographic Investigation into the Disintegration of Liquid Sheets [J]. Philosophical Transactions of Royal Society A， 1954， 247(924): 101-130.
[4] Taylor G I . Formation of Thin Flat Sheets of Water [J]. Proceedings of the Royal Society A， 1960， 259(1296): 1-17.
[5] Ranz W E . Some Experiments on the Dynamics of Liquid Films [J]. Journal of Applied Physics， 1959， 30(12):1950-1955.
[6] Miller K D . Distribution of Spray from Impinging Liquid Jets[J]. Journal of Applied Physics， 1960， 31(6): 1132-1137.
[7] Hasson D ， Peck R E . Thickness Distribution in a Sheet Formed by Impinging Jets[J]. American Institute of Chemical Engineers Journal， 1964， 10(5): 752-754.
[8] Ibrahim E A ， Przekwas A J . Impinging Jets Atomization [J]. Physics of Fluids A， 1991， 3(12):2981-2987.
[9] Bush J W M ， Hasha A E . On the Collision of Laminar Jets: Fluid Chains and Fishbones[J]. Journal of Fluid Mechanics， 2004， 511: 285-310.
[10] Bremond N ， Villermaux E . Atomization by Jet Impact [J]. Journal of Fluid Mechanics， 2006， 549: 273-306.
[11] 石少平，庄逢辰 . 射流撞击雾化索太尔平均直径的计算[J]. 推进技术， 1995， 16(3): 22-25. (SHI Shao-ping， ZHUANG Feng-chen. Calculation of the Sauter Mean Diameter of Jet-Impinging Atomizers [J]. Journal of Propulsion Technology， 1995， 16(3): 22-25.)
[12] Shen Y . Impinging Jet Atomization at Elevated and Super-Critical Ambient Conditions[D]. Chicago: University of Illinois at Chicago， 1997.
[13] Choo Y J ， Kang B S . Parametric Study on Impinging-Jet Liquid Sheet Thickness Distribution Using an Interferometric Method[J]. Experiments in Fluids， 2001， 31: 56-62.
[14] Choo Y J ， Kang B S . The Velocity Distribution of the Liquid Sheet Formed by Two Low-Speed Impinging Jets[J]. Physics of Fluids， 2002， 14(2): 622-627.
[15] Choo Y J ， Kang B S . The Effect of Jet Velocity Profile on the Characteristics of Thickness and Velocity of the Liquid Sheet Formed by Two Impinging Jets[J]. Physics of Fluids， 2007， 19(11).
[16] 施明恒 . 单个液滴撞击表面时的流体动力学特性[J]. 力学学报， 1985， 17(5): 419-425.
[17] Zhang J ， Yan D . Calculation of Average Shear Rate in Pipe Flow Based on Energy Dissipation Rate [J]. Acta Petrolei Sinica， 2002， 5( 23): 88-90.

凝胶推进剂模拟液撞击雾化特性研究

Analysis on Atomization Characteristics of Gelled Propellant Simulants Impinging Jets

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 0

编辑推荐

Metrics

本文评价