New Injector Nozzle Dsla150p1156 0433175343 for Fuel Injector 0414720124 0414720210 0414720260 0986441561

1 Fuel flow inside the diesel engine nozzle

The flow of diesel nozzles is a very complex process. In order to study the flow inside the nozzle simply and effectively, a computer numerical simulation is now carried out.

1.1 Development Status

At present, the development direction of diesel engines is basically high fuel flow rate, high injection pressure and low emission.

Among them, for the processing of the nozzle hole, its quality also directly affects the atomization characteristics of the diesel engine in the spray field [!I]. At the same time, as a key technology that restricts the development of diesel engines, the fine nozzle hole processing and forming technology of fuel injection nozzles is highly valued.

Among them, the processing quality of the nozzle hole has a direct impact on the atomization characteristics in the spray field

1.2 Main research content of this paper

In order to further analyze the influence of the change of nozzle structure parameters on the flow characteristics in the diesel engine nozzle, numerical simulation can be carried out through CFD, and this calculation method can be used to study the nozzle parameters and their changes of the fuel flow inside the nozzle, and obtain reasonable results, so as to improve fuel thermal efficiency.

The results show that as the injection pressure increases, the average velocity and pressure of the fuel at the nozzle outlet gradually increase, and the pressure difference in the nozzle hole also increases. When the fuel is injected into the atomization field, the particle size of the oil droplets becomes smaller, The penetration distance becomes longer, the fuel flow velocity increases, and the spray cone angle becomes larger, on the contrary, the concentration decreases.