气流中煤油凝胶液滴变形破碎过程的试验

推进技术 ›› 2017, Vol. 38 ›› Issue (12): 2857-2864.

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气流中煤油凝胶液滴变形破碎过程的试验

孔上峰,封锋,邓寒玉

南京理工大学机械工程学院，江苏南京 210094,南京理工大学机械工程学院，江苏南京 210094,南京理工大学机械工程学院，江苏南京 210094

发布日期:2021-08-15
作者简介:孔上峰，男，硕士生，研究领域为凝胶推进剂的雾化与燃烧。
基金资助:
航天科技创新基金(CASC03-02)；中央高校基本科研业务费专项基金(30920140112001)。

Experiment on Breakup of a Gelled Kerosene Droplet in Air Jet Flow

School of Mechanical Engineering，Nanjing University of Science and Technology，Nanjing 210094，China,School of Mechanical Engineering，Nanjing University of Science and Technology，Nanjing 210094，China and School of Mechanical Engineering，Nanjing University of Science and Technology，Nanjing 210094，China

Published:2021-08-15

摘要/Abstract

摘要： 为了研究煤油凝胶液滴的二次雾化特性，以煤油凝胶和煤油为工质，利用高速摄像系统对均匀气体射流中的液滴变形破碎过程进行了记录测量，获得了不同We下液滴变形破碎的模态特征及转变We，研究了Oh对总破碎时间的影响和We对最大直径变形率的影响。结果表明:在试验工况范围内，煤油凝胶和煤油液滴都依次出现振荡、袋形、多模态破碎模态，但模态特征和转换We不尽相同。煤油液滴总破碎时间随 Oh的增加而增加，而煤油凝胶液滴总破碎时间随Oh的增加先增加后减小再增加。煤油液滴最大直径变形率随We的增加先增加后不变，而煤油凝胶液滴最大直径变形率随We的增加先增加后减小。基于试验数据，分别获得了煤油凝胶和煤油液滴的总破碎时间关于Oh，最大直径变形率关于We的拟合关系式。

关键词: 煤油凝胶；液滴破碎；雾化；高速摄像仪

Abstract: In order to investigate the characteristic of gelled kerosene’s secondary atomization， a high speed camera was applied to record and measure the breakup of gelled kerosene and kerosene droplet in the uniform air jet flow. Morphology and transition We of the droplet， impact of Oh on total breakup time and We on the maximum dimensionless diameter deformation ratio were obtained. The results indicate that in the range of test conditions， gelled kerosene and kerosene droplet has the similar vibrational， bag and multimode breakup mode， but not the same at the morphology and transition We. The total breakup time of kerosene droplet increases with the increasing of Oh， while the time of gelled kerosene increases first， then decreases and finally increases again with the increasing of Oh. The maximum dimensionless diameter deformation ratio of kerosene droplet increases first and then does not change with the increasing of We， while the maximum dimensionless diameter deformation ratio of gelled kerosene droplet increases first and then decreases with the increasing of We. Based on the test data， correlations for gelled kerosene and kerosene droplet were proposed to predict the impact of Oh on total breakup time and We on the maximum dimensionless diameter deformation ratio.

Key words: Gelled kerosene；Droplet breakup；Atomization；High-speed camera

孔上峰,封锋,邓寒玉. 气流中煤油凝胶液滴变形破碎过程的试验[J]. 推进技术, 2017, 38(12): 2857-2864.

KONG Shang-feng,FENG Feng,DENG Han-yu. Experiment on Breakup of a Gelled Kerosene Droplet in Air Jet Flow[J]. Journal of Propulsion Technology, 2017, 38(12): 2857-2864.

参考文献

[1] 刘虎, 强洪夫, 王广. 凝胶推进剂射流撞击雾化研究进展[J]. 含能材料, 2015, 23(7): 697-708.
[2] 陈杰, 封锋, 马虎, 等. 基于PIV的凝胶模拟液撞击雾化速度场实验研究[J]. 推进技术, 2014, 35(4): 565-569. (CHEN Jie, FENG Feng, MA Hu, et al. Experimental Study on Impinging Velocimetry of Gel Simulants Based on PIV[J]. Journal of Propulsion Technology, 2014, 35(4): 565-569.)
[3] 刘虎, 强洪夫, 韩亚伟, 等. 幂律型凝胶推进剂射流撞击雾化SPH模拟[J]. 推进技术, 2015, 36(9): 1416-1425. (LIU Hu, QIANG Hong-fu, HAN Ya-wei, et al. SPH Simulation of Atomization Characteristics of Power-Law Gelled Propellant Formed by Two Impinging Jets[J]. Journal of Propulsion Technology, 2015, 36(9): 1416-1425.)
[4] 张蒙正, 左博. 幂律型凝胶推进剂管路中的流动特性[J]. 推进技术, 2009, 30(2): 246-250. (ZHANG Meng-zheng, ZUO Bo. Flow Behavior of Power Law Model Gelled Propellant in the Pipe[J]. Journal of Propulsion Technology, 2009, 30(2): 246-250.)
[5] 曹建明. 液体喷雾学[M]. 北京:机械工业出版社, 2013.
[6] Guildenbecher D R, López-Rivera C, Sojka P E. Secondary Atomization[J]. Experiments in Fluids, 2009, 46(3): 371-402.
[7] Hsiang L P, Faeth G M. Drop Deformation and Breakup due to Shock Wave and Steady Disturbances[J]. International Journal of Multiphase Flow, 1995, 21(4): 545-560.
[8] Pilch M, Erdman C A. Use of Breakup Time Data and Velocity History Data to Predict the Maximum Size of Stable Fragments for Acceleration Induced Breakup of a Liquid Drop[J]. International Journal of Multiphase Flow, 1987, 13(6): 741-757.
[9] Wilcox J D, June R K, Brown H A, et al. The Retardation of Drop Breakup in High-Velocity by Polymeric Modifiers[J]. Journal of Applied Polymer Science, 1961, 5(13): 1-6.
[10] Matta J E, Tytus R P. Viscoelastic Breakup in a High Velocity Airstream[J]. Journal of Applied Polymer Science, 1982, 27(2): 397-405.
[11] Arcoumanis C, Khezzar L, Whitelaw D S, et al. Breakup of Newtonian and Non-Newtonian Fluids in Air Jets[J]. Experiment in Fluids, 1994, 17(6): 405-414.
[12] Arcoumanis C, Whitelaw D S, Whitelaw J H. Breakup of Droplets of Newtonian and Non-Newtonian Fluids[J].Atomization Spray, 1996, 6(3): 245-256.
[13] Joseph D D, Beavers G S, Funada T. Rayleigh-Taylor Instability of Viscoelastic Drops at High Weber Numbers[J]. Journal of Fluid Mechanics, 2002, 453(6): 109-132.
[14] Joseph D D, Belanger J, Beavers G S. Breakup of a Liquid Drop Suddenly Exposed to a High-Speed Airstream [J]. International Journal of Multiphase Flow, 1999, 25(6-7): 1263-1303.
[15] Lopez Rivera C. Secondary Breakup of Inelastic Non-Newtonian Liquid Drops[D]. West Lafayette: Purdue University, 2010.
[16] Snyder S, Sojka P E. Secondary Atomization of Elastic Non-Newtonian Drops[C]. Nashville: 24th European Conference on Liquid Atomization and Spray Systems, 2011.
[17] 赵辉. 同轴气流式雾化机理研究[D]. 上海:华东理工大学, 2012.
[18] Hui Zhao, Hai-Feng Liu, Xian-Kui Cao. Breakup Characteristics of Liquid Drops in Bag Regime by a Continuous and Uniform Air Jet Flow[J]. International Journal of Multiphase Flow, 2011, 37(5): 530-534.
[19] Khosla S, Smith C E, Throckmorton R P. Detailed Understanding of Drop Atomization by Gas Cross Flow Using the Volume of Fluid Method[C]. Toronto: 19th Annual Conference on Liquid Atomization and Spray Systems, 2006.
[20] Hsiang L P, Faeth G M. Near-Limit Drop Deformation and Secondary Breakup[J]. International Journal of Multiphase Flow, 1992, 18(5): 635-652.　　　　　　　　　　　　　*　收稿日期:2016-07-20；修订日期:2016-09-01。基金项目:航天科技创新基金(CASC03-02)；中央高校基本科研业务费专项基金(30920140112001)。作者简介:孔上峰,男,硕士生,研究领域为凝胶推进剂的雾化与燃烧。E-mail: 1095461160@qq.com(编辑:梅瑛)

气流中煤油凝胶液滴变形破碎过程的试验

Experiment on Breakup of a Gelled Kerosene Droplet in Air Jet Flow

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