液滴撞击湿润壁面的运动形态及飞溅运动机制

宋云超; 宁智; 孙春华; 吕明; 阎凯; 付娟

doi:10.6052/0459-1879-13-053

液滴撞击湿润壁面的运动形态及飞溅运动机制

doi: 10.6052/0459-1879-13-053

宋云超^1,2,
宁智^1, ,,
孙春华¹,
吕明¹,
阎凯¹,
付娟¹

1.
北京交通大学机械与电子控制工程学院, 北京 100044
2. 北汽福田汽车股份有限公司工程研究院, 北京 102206

基金项目: 国家自然科学基金(51276011)、北京市自然科学基金(3132016)、国家高技术研究发展计划(2013AA065303)和内燃机燃烧学国家重点实验室开放基金(k2013-3)资助项目.

详细信息

通讯作者:
宁智，教授，主要研究方向：流体力学、内燃机燃烧与排放。E-mail：zhining@bjtu.edu.cn

中图分类号: O359
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出版历程
- 收稿日期: 2013-03-28
- 修回日期: 2013-05-14
- 刊出日期: 2013-11-18

MOVEMENT AND SPLASHING OF A DROPLET IMPACTING ON A WET WALL

1.
School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China
2. Engineering Research Institute, Foton Motor Group, Beijing 102206, China

Funds: The project was supported by the National Natural Science Foundation of China (51276011), Beijing Natural Science Foundation (3132016), National High Technology Research and Development Program of China (2013AA065303) and State Key Laboratory of Engines, Tianjin University (k2013-3).

摘要

摘要: 壁面液体层的存在对液滴撞击壁面的运动具有重要的影响。采用气液两相流动相界面追踪的水平集和流体体积复合方法和壁面润湿模型，实现了液滴撞击湿润壁面运动的数值求解；在此基础上，开展了液滴撞击湿润壁面运动的研究。研究结果表明：液滴以不同速度撞击湿润壁面时，会呈现出黏附铺展、波动运动、皇冠几何体运动以及飞溅运动等几种不同的运动形态，液滴撞击湿润壁面后的压力分布是不同运动形态形成的主要原因；飞溅运动是一定条件下皇冠几何体运动的一种特殊形态，液滴从皇冠几何体侧壁顶端的飞溅分离满足毛细破碎理论；撞击速度对分离液滴的运动方向影响较小，而对壁面液体层厚度的影响则较大；撞击速度和壁面液体层厚度对分离液滴形态、飞溅分离位置、飞溅速度以及飞溅发生时刻等都具有一定的影响。
- 液滴 /
- 湿润壁面 /
- 撞击 /
- 飞溅 /
- 分离
Abstract: The liquid layer has an important effect on the movement of a droplet after impacting on a wet wall. The numerical solution of the movement of a droplet impacting on a wet wall was realized by using the combined Level Set-VOF method for gas-liquid interface tracking and the wall wetting model, and the movement of a droplet impacting on a wet wall was researched. The results show that there are several different movement forms after a droplet impacting on a wet wall under different impacting velocities, such as adhesion spreading, wave, crown and splashing, and the pressure distribution induced by the impacting is the main reason of different movement forms. The movement of splashing is a special form of crown movement under certain conditions, and its formation satisfies the theory of capillary breaking. The effect of the impacting velocity on the movement direction of splashing is small, while the effect of the thickness of the liquid layer is bigger. Both impacting velocity and liquid layer have certain influence on the droplet shape, splashing separation position, splashing velocity and splashing occurrence time.
- droplets /
- wet wall /
- impacting /
- splashing /
- separation

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参考文献(21)

Lee SH, Ryou HS. Development of a new spray/wall interaction model. International Journal of Multiphase Flow, 2000, 26(1): 1209-1234

Lee SY, Ryu SU. Recent progress of spray- wall interaction research. Journal of Mechanical Science and Technology, 2006, 20(8): 1101-1117

万吉安, 黄荣华, 成晓北. 喷雾撞壁模型的发展. 柴油机设计与制造, 2004, (2): 28-34 (Wang Ji'an, Huang Ronghua, Chen Xiaobei. Review of spray-wall impingement models. Design and Manufacture of Diesel Engine, 2004, (2): 28-34 (in Chinese))

Roisman IV, Tropea C. Impact of a drop onto a wetted wall: description of crown formation and propagation. Journal of Fluid Mechanics, 2002, 472: 373-397

Taylor GI. The dynamics of thin sheets of fluid II. Waves on fluid sheets. Proceedings of the Royal Society of London Series A, 1959, 253: 296-312

Fedorchenko AI, Wang AB. On some common features of drop impact on liquid surfaces. Physics of Fluids, 2004, 16: 1349-1365

Starov VM, Zhdanov SA, Kosvintsev SR, et al. Spreading of liquid drops over porous substrates. Advances in Colloid and Interface Science, 2003, 104: 123-158

Starov VM, Kalinin VV, Chen JD. Spreading of liquid drops over dry surfaces. Advances in Colloid and Interface Science, 1994, 50: 187-221

Weiss DA, Yarin AL. Single drop impact onto liquid films: neck distortion, jetting, tiny bubble entrainment, and crown formation. Journal of Fluid Mechanics, 1999, 385: 229-254

Rieber M, Frohn A. A numerical study of the mechanism of splashing. International Journal of Heat and Fluid Flow, 1999, 20: 455-461

Davidson MR. Spreading of an inviscid drop impacting on a liquid film. Chemical Engineering Science, 2002, 57: 3639-3647

Cossali GE, Coghe A, Marengo M. The impact of a single drop on a wetted solid surface. Experiments in Fluids, 1997, 22: 463-472

Wang AB, Chen CC. Splashing impact of a single drop onto very thin liquid films. Physics of Fluids, 2000, 12: 2155-2158

Rioboo R, Bauthier C, Conti J, et al. Experimental investigation of splash and crown formation during single drop impact on wetted surfaces. Experiments in Fluids, 2003, 35: 648-652

Levin Z, Hobbs PV. Splashing of water drops on solid and wetted surfaces: hydrodynamics and charge separation. Philosophical Transactions of the Royal Society of London, Series A, 1971, 269: 555-585

Cossali GE, Marengo M, Coghe A, et al. The role of time in single drop splash on thin film. Experiments in Fluids, 2004, 36: 888-900

Sivakumar D, Tropea C. Splashing impact of a spray onto a liquid film. Journal of Fluid Mechanics, 2002, 14: 85-88

Edin B, Nils PVH, Suad J, et al. Drop impact onto a liquid layer of finite thickness: Dynamics of the cavity evolution. Physical Review E, 2009, 79: 036306

宋云超, 王春海, 宁智. 求解不可压缩两相流的复合Level Set-VOF方法研究. 燃烧科学与技术, 2011, 17(5): 443-450 (Song Yunchao, Wang Chunhai, Ning Zhi. Combined Level Set-VOF method used in the computation of incompressible two-phase flows. Journal of Combustion Science and Technology, 2011, 17(5): 443-450 (in Chinese))

宋云超, 宁智, 王春海. 基于唯象分析方法的壁面润湿模型研究. 燃烧科学与技术, 2012, 18(6): 521-527 (Song Yunchao, Ning Zhi, Wang Chunhai. Wall wetting model based on phenomenological analysis method. Journal of Combustion Science and Technology, 2012, 18(6): 521-527 (in Chinese))

Shinjo J, Umemura A. Simulation of liquid jet primary breakup: Dynamics of ligament and droplet formation. International Journal of Multiphase Flow, 2010, 36(7): 513-532

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