Diesel inyector Common Rail Fuel Injector 20R8968 for caterpillar c9 engine Cat Excavator Spare Parts

Research on the Influence of Injector nozzle Movement of Diesel Engine Injector on the Injection Characteristics of Each Hole (part 3 )

(3)The cavitation flow in the nozzle hole has an important influence on the jet atomization outside the nozzle hole. The Euler-Eulerian two-fluid simulation method of the cavitation flow inside the nozzle of the multi-hole injector and the Lagrang of the nozzle outlet are established. A coupled model for the discrete droplet spray simulation method for daily fuel oil. The model indirectly couples two distinct numerical solutions for the continuous phase and the discrete phase, effectively analyzing the correlation between internal flow and fuel atomization. Through the test bench for the fuel injection characteristics of each hole and the spray test bench based on the schlieren method, the fuel injection characteristics such as the fuel injection rate and cycle injection volume of each hole, and the macroscopic spray such as the spray penetration distance of each hole were respectively obtained. characteristics, and verified the established numerical calculation model. The results show that the simulated and experimental values are in good agreement, the injection rate and spray penetration distance of the lower nozzle holes are larger than those of the upper nozzle holes, and the cavitation development of the lower nozzle holes is weaker.
(4) Based on the theory of material mechanics, elastic mechanics and linear elasticity, the Injector nozzle is regarded as a cantilever beam, the deformation of the Injector nozzle head is calculated by using the bending deformation theory of the beam, and the elasticity of the Injector nozzle is established based on the force analysis of the Injector nozzle.