直流喷射首次破碎的形变过程研究

推进技术 ›› 2016, Vol. 37 ›› Issue (7): 1334-1340.

直流喷射首次破碎的形变过程研究

刘日超^1,2,乐嘉陵²,杨顺华²,郑忠华²,宋文艳¹,黄渊²

西北工业大学动力与能源学院，陕西西安 710072; 中国空气动力研究与发展中心高超中心，四川绵阳 621000,中国空气动力研究与发展中心高超中心，四川绵阳 621000,中国空气动力研究与发展中心高超中心，四川绵阳 621000,中国空气动力研究与发展中心高超中心，四川绵阳 621000,西北工业大学动力与能源学院，陕西西安 710072,中国空气动力研究与发展中心高超中心，四川绵阳 621000

发布日期:2021-08-15
作者简介:刘日超，男，博士生，研究领域为燃烧室燃烧与流动。

Investigation of Deformation of Primary

School of Power and Energy，Northwestern Polytecnical University，Xi’an 710072，China; Air-Breathing Hypersonic Technology Research Center，China Aerodynamics Research and Development Center，Mianyang 621000，China,Air-Breathing Hypersonic Technology Research Center，China Aerodynamics Research and Development Center，Mianyang 621000，China,Air-Breathing Hypersonic Technology Research Center，China Aerodynamics Research and Development Center，Mianyang 621000，China,Air-Breathing Hypersonic Technology Research Center，China Aerodynamics Research and Development Center，Mianyang 621000，China,School of Power and Energy，Northwestern Polytecnical University，Xi’an 710072，China and Air-Breathing Hypersonic Technology Research Center，China Aerodynamics Research and Development Center，Mianyang 621000，China

Published:2021-08-15

摘要/Abstract

摘要： 为深入了解直流喷射过程中射流柱的细部结构以及其脱落过程，利用LES结合VOF的方法，对静止大气中垂直射流现象进行模拟。模拟得到的液相喷雾结构和试验结果能够很好地吻合。通过计算观察得到射流柱进入到大气中后由于Rayleigh-Taylor(RT)不稳定性迅速形成伞状的头部，头部的边缘在不断变薄失稳的过程中脱落形成液带，液带脱落产生的液滴具有等距性，间距为0.106mm，并在伞状边缘的下方形成一个气涡，气涡与上游的射流柱相互作用，促进射流柱表面的脱落。射流柱表面由于Kelvin-Helmholtz(K-H)表面波的作用呈现鱼鳞状的结构，并导致射流柱整体断裂、破碎，其表面波波长由初始的0.26mm迅速增长到0.78mm。

关键词: RT不稳定性；射流柱；首次破碎；VOF；雾化

Abstract: In order to deeply understand mechanisms of spray column structure and process of atomization in direct injection，the vertical spray in quiescent gas is conducted based on the method of VOF(Volume of Fluid) and LES(large eddy simulation) method. The results of simulation are in good agreement with the experimental results. An umbrella-like head shape was formed after the spray injected into atmosphere by instability of Rayleigh-Taylor. Tip of edge was broken and generated ligaments at phase of spray thinner，droplets shed from ligament were distributed equidistantly with 0.1mm . Vortex was formed behind tip edge at the same time. The vortex interacts with liquid column and promotes shedding from liquid core surface. Surface of spray column appears fish scale because of Kelvin-Helmholtz(K-H) surface wave，it leads to spray column atomization，and wavelength becomes longer from 0.26mm to 0.78mm.

Key words: Rayleigh-Taylor(RT) instability；Spray column；Primary breakup；Volume of fluid；Atomization

刘日超,乐嘉陵,杨顺华,郑忠华,宋文艳,黄渊. 直流喷射首次破碎的形变过程研究[J]. 推进技术, 2016, 37(7): 1334-1340.

LIU Ri-chao^1,2,LE Jia-ling²,YANG Shun-hua²,ZHENG Zhong-hua²,SONG Wen-yan¹,HUANG Yuan². Investigation of Deformation of Primary[J]. Journal of Propulsion Technology, 2016, 37(7): 1334-1340.

参考文献

[1] Lee K W, Spencer R C. Photo Micrographic Studies of Fuel Sprays[R]. NACA 454, 1933.
[2] Grant R P, Middleman S. Newtonian Jet Stability[J]. AICHE Journal, 1966, 12(4): 669-678.
[3] Huang Z, Shao Y M, Seiichi S. The Orifice Flow on the Atomization of Fuel Containing Dissolved Gas[J]. Atomization and Sprays, 1994, (4): 123-133.
[4] Byung S P, Sang Y L. An Experimental Investigation of the Flash Atomization Mechanism[J]. Atomization and Sprays, 1994, (4): 159-179.
[5] 王少林, 黄勇, 邹婷. 空化对燃油喷嘴雾化的影响[J]. 推进技术, 2014, 35(3): 397-402. (WANG Shao-lin, HUANG Yong, ZOU Ting. Effects of Cavitation in Nozzle on Spray[J]. Journal of Propulsion Technology, 2014, 35(3): 397-402.)
[6] Shkadov V Ya. Wave Formation on Surface of Viscous Liquid due to Tangential Stress[J]. Fluid Dynamics, 1970: 473-476.
[7] Hongbok Park, Stephen D, Heister. A Numerical Study of Primary Instability on Viscous High Speed Jets[J]. Computers & Fluids, 2006, 35: 1033-1045.
[8] Sallam K A, Dai Z, Faeth M. Liquid Breakup at the Surface of Turbulent Round Liquid Jets in Still Gases[J].International Journal of Multiphase Flow, 2002, 28: 427-449.
[9] Kuo K K. Recent Advances in Spray Combustion: Spray Atomization and Drop Burning Phenomena. Progress in Astronautics and Aeronautics[M]. Washington DC: AIAA Inc., 1996.
[10] O’Rourke P J, Amsden A A. The TAB Method for Numerical Calculation of Spray Droplet Breakup[R]. SAE, 87-2089.
[11] Hirt C W, Nichols B D. Volume of Fluid (VOF) Method for the Dynamics of Free Boundary[J]. Journal of Computational Physics, 1981, 39: 201-225.
[12] Osher S, Fedkiw R. Level Set Methods and Dynamic Implicit Surfaces[M]. Berlin: Springer, 2003.
[13] Menard T, Tanguy S, Berlemont A. Coupling Level Set/VOF/Ghost Fluid Methods: Validation and Application to 3D Simulation of the Primary Break- up of a Liquid Jet[J]. International Journal of Multiphase Flow, 2007, 33: 510－524.
[14] Martinez J M, Chensneau X, Zeghmati B. A New Curvature Technique Calculation for Surface Tension Contribution in PLIC-VOF Method[J]. Computational Mechanics, 2006, 37(2): 182-193.
[15] Dexjardins O, Moureau V, Pitsch H. An Accurate Conservative Level Set/Ghost Fluid Method for Simulating Turbulent Atomization[J]. Journal of Computational Physics, 2008, 227(18): 8395-8416.
[16] Shinjo J, Umemura A. Simulation of Liquid Jet Primary Breakup: Dynamics of Ligament and Droplet Formation[J]. International Journal of Multiphase Flow, 2010, 03(8): 513-532.
[17] Shinjo J, Umemura A. Surface Instability and Primary Atomization Characteristics of Straight Liquid Jet Sprays[J]. International Journal of Multiphase Flow, 2011, 08(2): 1294-1304.
[18] 刘娟, 李清廉, 刘卫东. 离心式喷嘴液膜破碎过程实验[J]. 推进技术, 2011, 32(14): 539-543. (LIU Juan, LI Qing-lian, LIU Wei-dong. Experiment on Liquid Sheet Breakup Process of Pressure Swirl Injector[J].Journal of Propulsion Technology, 2011, 32(14): 539-543.)
[19] 刘娟, 李清廉, 王振国. 基于VOF方法模拟离心式喷嘴内部流动过程[J]. 航空动力学报, 2011, 26(9): 1986-1994.
[20] Hirt C W, Nichols B D. Volume of Fluid (VOF) Method for the Dynamics of Free Boundaries[J]. Journal of Computational Physics, 1981, 39: 201-225.
[21] Youngs D L. Time-Dependent Multi-Material Flow with Large Fluid Distortion[M]. USA: Academic Press, 1982.
[22] Ubbink O. Numerical Prediction of Two Fluid Systems with Sharp Interfaces[D]. London: Imperial College of Science, Technology and Medicine, 1997.
[23] 刘儒勋, 刘晓平, 张磊. 运动界面的追踪和重构方法[J]. 应用数学和力学, 2004, 25(3): 279-290.
[24] Hiroshi Hattori, KiKuo Narumiya. Analysis of Initial Breakup Mechanism of Diesel Spray Injected into High Pressure Ambience[R]. SAE Technical, 2004-01-0528.(编辑:梅瑛)　　　　　　　　　　　　　*　收稿日期:2015-08-01；修订日期:2015-10-20。作者简介:刘日超 ,男,博士生,研究领域为燃烧室燃烧与流动。 E-mail: lrc19860517@sina.cn