Diesel Injector Fuel Injector 095000-6140 6261-11-3200 Denso Injector for Komatsu

From research results，three important conclusions can be drawn. With the increase of roughness height of the nozzle wall，the cavitation intensity reduced，while the turbulence kinetic energy increased；the influence of wall roughness height on the mass flow rate at the nozzle exit is not obvious，which is slightly increased under the condition of high injection pressure；With the increase of wall roughness height，the mean velocity and turbulence kinetic energy decreased and enlarged remarkably at the orifice exit under the condition of high injection pressure，respectively. However，with the increase of wall roughness height，the decreasing amplitude of mean velocity and the increasing amplitude of turbulence kinetic energy at the nozzle exit are both lesser relatively under the condition of low injection pressure；Along the X axis at the nozzle outlet，the turbulence kinetic energy at the cavity region near the superior surface of the orifice is bigger than that near the bottom and central area. The generation and collapse of cavitation can enhance the turbulence kinetic energy at the orifice exit.

The high-speed flow of fuel in the fuel injection nozzle of a high-pressure common rail diesel engine makes it extremely easy inside. The phenomenon of cavitation is formed. A large number of studies have shown that the cavitation effect and turbulence characteristics inside the nozzle have a significant impact on the jet atomization of fuel and the power and emission performance of diesel engine. It can be seen that the development trend of high injection pressure and microporous injection in modern high-pressure common rail fuel injection system is of great significance to the study of cavitation phenomenon inside the nozzle.