2009•Journal of Zhengzhou University of Light IndustryRequires access
3D numerical simulation of cavitation transient flow inside diesel injection nozzles
Jianying Ma
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Abstract
A three-dimensional two-phase model of cavitation flow in nozzle was developed,and the simulation on two-phase transient cavitating flow inside vertical multi-holes diesel injection nozzle was dealt with.With the model,the velocity field,pressure field and turbulent energy distribution inside injection nozzle were analyzed in detail.Simulation results showed that the distribution of turbulent energy was at the top of orifice where cavitation distributes,with the increase of nozzle lift,cyclic pressure drop at the intake of orifice was more remarkable,and the domain of eddy flow was bigger.Cavitating flow characteristics in different needle lift,its generation and developing process were pointed out,which provided basis for advanced simulation and analysis of fuel spray.The calculation results from the model had good agreement with the experimental graphics available in the literatures.