液体圆柱射流破碎过程的实验

万云霞; 黄勇; 朱英

液体圆柱射流破碎过程的实验

北京航空航天大学能源与动力工程学院, 北京 100083

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出版历程
- 收稿日期: 2007-01-08
- 修回日期: 2007-05-21
- 刊出日期: 2008-02-28

Experiment on the breakup process of free round liquid jet

School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

摘要

摘要: 采用高速摄像仪对圆柱射流的表面剥离现象和射流破碎长度进行了实验,在低速射流下,分析了Rayleigh模式下主液滴和卫星液滴形成过程及运动规律.随着射流速度的增大,射流表面开始出现了表面剥离小液滴.并发现存在一个临界雷诺数,当超过临界雷诺数时,射流表面出现表面剥离现象.通过对射流中表面剥离现象的实验和分析,给出了两种射流破碎长度随雷诺数变化规律和破碎长度拟合关系式.
- 航空、航天推进系统 /
- 圆柱射流 /
- 高速摄影 /
- 表面剥离 /
- 卫星液滴 /
- 破碎长度
Abstract: An experiment was conducted to investigate the surface stripping and breakup lengths of a round water jet.The process of the main and the satellite droplets in Rayleigh model was further studied under low jet velocity.With the increase of jet velocity,small droplets were stripped off from the jet surface.The surface striping did not appear on the jet surface until the Reynolds number exceeded a critical value.Two jet breakup lengths(the stripping length and the pinch length) were defined and the variations of the two breakup lengths with the jet Reynolds number were plotted,and the correlations fitted for the two breakup lengths were obtained.
- aerospace propulsion system /
- round jet /
- high speed camera /
- surface stripping /
- satellite droplet /
- breakup length

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参考文献(12)

[1]	Arai M,Amagai K.Sudace wave transition bdore breakup on a laminar liquid jet[J].Int.J.Heat and Fluid Flow,1999,20:507-512.
[2]	Liu H M.Science and engineering of droplets:fundamentals and applications[M].Norwich,New York:NOYES Publications,2000.
[3]	Lin S P.Breakup of liquid sheets and jets[M].Cambridge:Cambridge University Press,2003.
[4]	Varga C M.Atomization of a small diameter liquid Jet by a high speed gas stream[D].Ph.D Thesis,UC San Diego,2002.
[5]	Rayleigh L.On the instability of jets[J].Proc.London Math.Soc.,1879,10(4):351-371.
[6]	Yang H Q.Asymmetric instability of a liquid jet[J].Phys.Fluids A,1992,4:681-689.
[7]	Morozumi Y,Fukai J.Growth and structure of surface disturbances of a round liquid jet in a coaxial airflow[J].Fluid Dynamics Research,2004,34:217-231.
[8]	Sallam K A,Dai Z,Faeth G M.Liquid breakup at the surface of turbulent round liquid jeta in still gases[J].Inter.J.Muhiphase Flow,2002,28:427-449.
[9]	ZHU Ying,WAN Yunxia,HUANG Yong,et al.Study on the breakup lengths of free round liquid jets[R].Kunming:The First International Symposium on Jet Propulsion and Power Engineering,2006:112-116.
[10]	Hoyt J W,Taylor J J.Waves on water jets[J].Fluid Mechanism,1977,83:119-27.
[11]	MeCracken M E,Abraham J.Simulations of liquid breakup with an axisymmetric,multiple relaxation time,indexfunction lattice bohzmann model[J].International Journal of Modern Physics,2005,16(11):1671-1692.
[12]	朱英,黄勇,郭志辉.液体圆形射流变形破碎及破碎长度实验[R].吉林:冲压发动机技术交流会,2005:462-465.ZHU Ying,HUANG Yong,GUO Zhihui.Experimental study on round liquid jet deformation and breakup length[R].Jilin;Symposium of Ramjet Engine Technology,2005:462-465.