Genuine New Common Rail Injector Nozzle L246pbc for Fuel Injector
products detail
Used in Vehicles / Engines
| Product Code | L246pbc |
| Engine Model | / |
| Application | / |
| MOQ | 6 pcs / Negotiated |
| Packaging | White Box Packaging or Customer's Requirement |
| Warranty | 6 months |
| Lead time | 7-15 working days after confirm order |
| Payment | T/T, PAYPAL, as your preference |
| Delivery Method | DHL, TNT, UPS, FedEx, EMS or Requested |
FAQ
Research on the Influence of Injector nozzle Movement of Diesel Engine Injector on the Injection Characteristics of Each Hole (part2 )
The main research content of the paper is as follows:
(1) Based on the law of conservation of momentum and Bernoulli's theorem, a test system for the transient fuel injection characteristics of each hole based on the spray momentum flow test principle was designed and built. The test system can collect the instantaneous fuel injection rate of each hole of the multi-hole injector at the same time, and realize the cycle collection of multiple fuel injection durations. The accuracy and reliability of the test system are analyzed.
(2) Based on the open source C++ class library OpenFOAM? platform, on the basis of the rhoCentralFoam solver for compressible transonic flow, the code for solving compressible gas-liquid two-phase flow inside the nozzle was developed and implanted. The solver uses the homogeneous flow model to solve the multiphase fuel flow in the nozzle and solves the two-phase phase transition through the positive pressure equation of state. Since the standard RNGk-ε turbulence model is not accurate enough to solve the compressible flow, especially the cavitation phenomenon in the low pressure region, the turbulence model is revised by introducing a density function related to the cavitation state instead of a constant density. In addition, when solving Euler's equations for compressible fluids, there are usually discontinuous solutions, namely the Riemann problem, due to the strong hyperbolic mathematical characteristics of the equations.
In this paper, an approximate Riemann solver is used to process the numerical flux of the mesh to capture the discontinuous solution, that is, the shock wave phenomenon of the compressible fluid. The model is used to analyze the influence of the Injector nozzle movement on the cavity flow inside the nozzle of a double-hole injector, and the established CFD model is verified by using the measured fuel injection laws of each hole. The simulation results show that the model can accurately capture the cavitation and turbulence quasi-sequential structure that develops periodically in the nozzle, and the cavitation development of the upper nozzle hole is more severe than that of the lower nozzle hole.
