Breakup Characteristics of Power Law Fluid from Symmetric Impinging Jet Injector Under Different Ambient Pressures

被引：0
|
作者：
Zheng L. [1 ]
Bai F. [1 ,2 ]
Yang Z. [1 ]
Guo J. [1 ]
Du Q. [1 ]
机构：
[1] State Key Laboratory of Engines, Tianjin University, Tianjin
[2] Internal Combustion Engine Research Institute, Tianjin University, Tianjin
来源：
Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines) | 2019年 / 37卷 / 01期
关键词：
Breakup length; Breakup regimes; Impinging jet; Power law fluid; Surface wave length;
D O I：
10.16236/j.cnki.nrjxb.201901011
中图分类号：
学科分类号：
摘要：
Experimental observations and analysis on the fluid sheet formed by symmetric impinging jet injectors of power law fluid under high ambient pressure were presented. Constant volume chamber system and high-speed photography technology were used to obtain breakup regimes and spray characteristics. The characteristic parameters such as breakup length L and wave length λ were extracted from the photograph. This paper investigated the environmental parameter(ambient pressure), jet parameter(Weber number), geometry parameter(orifice diameter)and physical parameter(fluid viscosity)on the atomization behaviors of liquid sheets. It is found that the spray regimes could be qualitatively categorized into five types: closed-rim, open-rim, rimless, bow-shaped ligaments and fully developed regimes. In the open space, the L increases with the We in 'double peak' mode. While in the case of situation with ambient pressure, the L and the We are in 'single peak' mode. Compared with the open space conditions, the high ambient pressure conditions are more favorable to the power law fluid symmetric impact jet breakup. And the increase of orifice diameter and fluid viscosity all inhibit the impingement jet from breakup. An empirical relation for predicting the surface wave length is proposed. © 2019, Editorial Office of the Transaction of CSICE. All right reserved.
引用
收藏
页码：76 / 83
页数：7
相关论文
共 15 条
  • [1] Choo Y.J., Kang B.S., A study on the velocity characteristics of the liquid elements produced by two impinging jets, Experiments in Fluids, 34, 6, pp. 655-661, (2003)
  • [2] Lai W.H., Huang W., Jiang T.L., Characteristic study on the like-doublet impinging jets atomization, Atomization & Sprays, 9, 3, pp. 277-289, (1999)
  • [3] Li R., Ashgriz N., Characteristics of liquid sheets formed by two impinging jets, Physics of Fluids, 18, 8, pp. 4-16, (2006)
  • [4] Jung K., Khil T., Yoon Y., Et al., The breakup characteristics of liquid sheet formed by like-doublet injectors, 38th AIAA Joint Propulsion Conference and Exhibit, (2002)
  • [5] Chen X., Ma D., Yang V., Et al., High-fidelity simulations of impinging jet atomization, Atomization and Sprays, 23, 12, pp. 1070-1101, (2013)
  • [6] Von K.J., Alberio F., Ciezki H.K., Spray and combustion characteristics of aluminized gelled fuels with an impinging jet injector, Aerospace Science and Technology, 11, 1, pp. 77-83, (2007)
  • [7] Fu Q., Yang L., Cui K., Et al., Effects of orifice geometry on gelled propellants sprayed from impinging-jet injectors, Journal of Propulsion and Power, 30, 4, pp. 1112-1117, (2014)
  • [8] Bai F., Diao H., Zhang M., Et al., Breakup characteristics of power-law liquid sheets formed by two impinging jets, Fluid Dynamics Research, 46, 5, pp. 6-21, (2014)
  • [9] Fu Q., Duan R., Yang L., Spray of gelled propellants from an impinging-jet injector under different temperatures, Aerospace Science and Technology, 39, 1, pp. 552-558, (2014)
  • [10] Yang L., Fu Q., Qu Y., Et al., Breakup of a power-law liquid sheet formed by an impinging jet injector, International Journal of Multiphase Flow, 39, 1, pp. 37-44, (2012)
12