Experiment of Transient Cavitating Flow in the Real-Size Diesel Injector Nozzle

被引：0
|
作者：
Zhang Z. [1 ]
He Z. [2 ]
Guo G. [1 ]
Sun S. [1 ]
Tao X. [1 ]
机构：
[1] School of Energy and Power Engineering, Jiangsu University, Zhenjiang
[2] Institute for Energy Research, Jiangsu University, Zhenjiang
来源：
He, Zhixia (zxhe@ujs.edu.cn) | 1600年 / Chinese Society for Internal Combustion Engines卷 / 35期
关键词：
Diesel engine; Real-size injector nozzle; String cavitation; Transient flow;
D O I：
10.16236/j.cnki.nrjxb.201702020
中图分类号：
学科分类号：
摘要：
Cavitating flow in diesel injector nozzles affects the subsequent atomization behavior and spray characteristics which strongly affect diesel engine performance and emissions. Special attention was focused on the flow and spray characteristics in the real-size diesel injector nozzle based on the high pressure common rail experimental system with a high-speed digital camera and long working distance microscope. A comparative study at different pressures was conducted to analyze the evolution of cavitation inside diesel nozzle, and the experimental results show that increasing injection pressure leads to the earlier occurance of cavitation inception. The bubble "sucktion" from orifice exit at the end of injection and the bubble "discharge" at the next injection initial stage were observed. The "string cavitation" as a special cavitation phenomenon was also observed. And the occurrence of "string cavitation" has a strong correlation to the position of needle. Furthermore, the occurrence regularity of the string cavitation was also investigated. © 2017, Editorial Office of the Transaction of CSICE. All right reserved.
引用
收藏
页码：136 / 141
页数：5
相关论文
共 8 条
  • [1] Bergwerk W., Flow pattern in diesel nozzle spray holes, Proceedings of the Institution of Mechanical Engineers, 173, 1, pp. 655-660, (1959)
  • [2] Andrew A., Gavaises M., Arcoumanis C., Vortex flow and cavitation in diesel injector nozzles, Journal of Fluid Mesh, 610, 1, pp. 195-215, (2008)
  • [3] Payri R., Margot X., Salvador F., A numerical study of the influence of diesel nozzle geometry on the inner cavitating flow, SAE Paper, (2002)
  • [4] Arcoumanis C., Flora H., Gavaises M., Et al., Cavitation in real-size multi-hole diesel injector nozzles, SAE Paper, (2000)
  • [5] Roth H., Gavaises M., Arcoumanis C., Cavitation initiation, its development and link with flow turbulence in diesel injector nozzles, SAE Paper, (2002)
  • [6] Chaves H., Knapp M., Kubitzek A., Et al., Experimental study of cavitation in the nozzle hole of diesel injectors using transparent nozzles, SAE Paper, (1995)
  • [7] Badock C., Wirth R., Fath A., Et al., Investigation of cavitation in real size diesel injection nozzles, International Journal of Heat and Fluid Flow, 20, 5, pp. 538-544, (1999)
  • [8] Lockett R.D., Liverani L., Thaker D., Et al., The characteristics of diesel nozzle flow using high speed imaging of elastic light scattering, Fuel, 106, pp. 605-616, (2013)
1