An Experimental Investigation of Cavitating Flow in Diesel Injector Nozzle under Different Back Pressures

Abstract:

A study was carried out on the influence of different back pressures on internal flow of diesel injector nozzles. For this study, a flow visualization experimental system equipped with a pressurized chamber was setup. Experimental results show that, with the injection pressure remain constant and increase back pressure leading to the cavitation area diminished gradually and even disappeared. With a same pressure difference, higher back pressure test condition promoted the outlet mean velocity and inhibited the occurrence of cavitation inception, which demanded a larger pressure difference to make it happen. Moreover, it also resulted in a relatively large flow losses to the single phase flow compared to the cavitating flow.

• Periodical: Advanced Materials Research (Volumes 960-961)
• Pages: 1446-1449
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.960-961.1446
• Online since: June 2014
• Authors: Xi Cheng Tao, Zhi Xia He*, Peng Zhao, Wen Jun Zhong, Gen Miao Guo
• Keywords: Back Pressure, Cavitating Flow, Diesel Injector Nozzles, Visualization

References

[1] F. Payri, V. Bermudez, R. Payri, F. J. Salvador. Fuel, 83(2004)419-431.

[2] Schmidt D P, Rutland C J, Corradini M L. SAE Paper, 971587, (1997).

[3] Z.X. He, W.J. Zhong. International Journal of Thermal Sciences 2013, 70: 132-143.

[4] R. Payri, F.J. Salvador, J. Gimeno, J. de la Morena. International journal of heat and fluid flow. 30(2009) 768-777.

DOI: 10.1016/j.ijheatfluidflow.2009.03.011

[5] Nurick W.H. Journal Fluids Engineering, 1976, Vo1. 98.