超声速条件下亚毫米液滴的变形破碎模态

施红辉; 师顺; 刘晨

doi:10.13224/j.cnki.jasp.2020.10.001

超声速条件下亚毫米液滴的变形破碎模态

doi: 10.13224/j.cnki.jasp.2020.10.001

基金项目: 国家自然科学基金（11772309）；浙江省基础公益研究计划项目（LGG19A020002）

计量
- 文章访问数: 318
- HTML浏览量: 6
- PDF量: 464
- 被引次数: 0
出版历程
- 收稿日期: 2020-03-17
- 刊出日期: 2020-10-28

Deformation and fracture patterns of sub-millimeter droplets under supersonic conditions

Faculty of Mechanical Engineering and Automation,Zhejiang Sci-Tech University,Hangzhou 310018,China

摘要

摘要: 以超声速气流中液滴变形破碎行为为研究内容,对水平激波管中承受激波冲击的亚毫米水液滴(0.44~1.09 mm)变形破碎过程进行了观测,实验激波马赫数范围为1.07~2.11。利用纹影法,结合高分辨率高速相机对不同破碎模态下液滴的变形破碎特征进行了记录,得到了袋状、多模态、剪切和爆炸式等破碎模式下的液滴纹影图像,分析了液滴运动参数的时空关系。得出了液滴变形阶段,液滴无量纲横向变形宽度以及液滴无量纲迎风面位移随无量纲时间的变化发展规律,并且得出在液滴初始直径相同时,不同液滴破碎模式的无量纲最大横向变形宽度的变化,其中袋状、多模态、剪切破碎模式的无量纲横向最大变形宽度均在1.15~1.61范围内变化,爆炸式破碎模式的无量纲横向最大变形宽度均在0.21~0.68范围内变化。
- 激波管 /
- 亚毫米液滴 /
- 高速摄影 /
- 纹影法 /
- 破碎模式
Abstract: Based on the deformation behavior and mechanism of droplet deformation under supersonic conditions, the deformation and fracture process of sub-millimeter water droplets(0.44-1.09 mm) under shock was observed in a horizontal shock tube. The shock Mach number range was 1.07-2.11. Using the schlieren method, in combination with the high-resolution high-speed camera to record the deformation and fracture characteristics of droplets under different crush modes, the droplet streak images of the bag-shaped crushing, multi-modal crushing, shearing and explosive crushing modes were obtained. The droplet pattern image was analyzed on the temporal and spatial relationship of the motion parameters of the droplet. The development law of the droplet deformation stage with different diameters, the dimensionless lateral deformation width of the droplet and the dimensionless windward surface displacement of the droplet with the dimensionless time were obtained. And the maximum dimensionless lateral deformation was obtained with different droplet breaking modes when the initial diameter of the droplet was the same. As for the width changes, the dimensionless transverse maximum deformation widths variation range of the bag-shaped, multi-modal and shear crushing modes was 1.15-1.61, and the dimensionless maximum transverse deformation widths variation range of the explosive crushing mode was 0.21-0.68.
- shock tube /
- sub-millimeter drop /
- high speed photography /
- schlieren method /
- broken mode

HTML

参考文献(19)

[1]	孙岳,黄海明.飞行器涂层侵蚀机理分析［J］.科学技术与工程,2007,7(23):6146-6149.SUN Yu,HUANG Haiming.Analysis of erosion mechanism of aircraft coating［J］.Science Technology and Engineering,2007,7(23):6146-6149.(in Chinese)
[2]	王振国,梁剑寒,丁猛,等.高超声速飞行器动力系统研究进展［J］.力学进展,2009,39(6):716-739.WANG Zhenguo,LIANG Jianhan,DING Meng,et al.A review on hypersonic airbreathing propulsion system［J］.Advances in Mechanics,2009,39(6):716-739.(in Chinese)
[3]	HINZE J O.Critical speeds and sizes of liquid globules［J］.Flow,Turbulence and Combustion,1949,1(1):273-288.
[4]	LANE W.Shatter of drops in streams of air［J］.Industrial and Engineering Chemistry,1951,43(6):1312-1317.
[5]	GORDON G D.Mechanism and speed of breakup of drops［J］.Journal of Applied Physics,1959,20(11):1759-1761.
[6]	RANGER A,NICHOLLS J.Aerodynamics shattering of liquid drops［J］.AIAA Journal,1969,7(2):285-290.
[7]	REINECKE W G,MCKAY W L.Experiments on water drop breakup behind Mach 3 to 12 shocks［R］.Sandia Corporation,SC-CR-70-6063,1969.
[8]	TEMKIN S,KIM S S.Droplet motion induced by weak shock waves［J］.Journal of Fluid Mechanics,1980,96(1):133-157.
[9]	THEOFANOUS T G,LI G J,DINH T N,et al.Aerobreakup in disturbed subsonic and supersonic flow fields［J］.Journal of Fluid Mechanics,2007,593:131-170.
[10]	THEOFANOUS T G,LI G J.On the physics of aerobreakup［J］.Physics of Fluids,2008,20(5):2599-2604.
[11]	THEOFANOUS T G.Aerobreakup of Newtonian and viscoelastic liquids［J］.Annual Review of Fluid Mechanics,2011,43(1):661-690.
[12]	THEOFANOUS T G,MITKIN V V,Ng C L,et al.The physics of aerobreakup:Ⅱ viscous liquids［J］.Physics of Fluids,2012,24(2):022104.1-022104.39.
[13]	THEOFANOUS T G,MITKIN V V,Ng C L.The physics of aerobreakup:Ⅲ viscoelastic liquids［J］.Physics of Fluids,2013,25(3):032101.1-032101.46.
[14]	MENG J C,COLONIUS T.Droplet breakup in high-speed gas flows［R］.Jeju,Korea:the 8th International Conference on Multiphase Flow,2013.
[15]	MENG J C,COLONIUS T.Numerical simulations of the early stages of high-speed droplet breakup［J］.Shock Waves,2015,25(4):399-414.
[16]	耿继辉,叶经方,王健,等.激波诱导液滴变形和破碎现象实验研究［J］.工程热物理学报,2003,24(5):797-800.GENG Jihui,YE Jingfang,WANG Jian,et al.Experimental investigation on phenomena of shock wave-induced droplet deformation and breakup［J］.Journal of Engineering Thermophysics,2003,24(5):797-800.(in Chinese)
[17]	金仁瀚,刘勇,王锁芳.连续均匀热气流中液核/袋状破碎特性实验［J］.航空动力学报,2017,32(2):280-288.JIN Renhan,LIU Yong,WANG Suofang.Experimental study on liquid core/bag crushing characteristics in continuous uniform hot gas flow［J］.Journal of Aerospace Power,2017,32(2):280-288.(in Chinese)
[18]	金仁瀚,刘勇,王锁芳.单液滴羽状/液膜稀释破碎特性研究［J］.推进技术,2017,38(4):885-895.JIN Renhan,LIU Yong,WANG Suofang.Experimental investigations of breakup characteristic of single droplet in plume/sheet-thinning breakup regime in airflow［J］.Journal of Propulsion Technology,2017,38(4):885-895.(in Chinese)
[19]	熊红平,刘金宏,施红辉,等.高速氩气流中水滴和电子氟化液滴变形破碎的实验研究［J］.浙江理工大学学报(自然科学版),2017,37(3):409-416.XIONG Hongping,LIU Jinhong,SHI Honghui,et al.Experiments on deformation and breakup of water and electronic fluoride droplets in high-speed argon stream［J］.Journal of Zhejiang Scit-Tech University (Natural Sciences Edition),2017,37(3):409-416.(in Chinese)