In this paper, a high-fidelity numerical simulation of the jet crushing and spray formation process of a complex diesel engine injector is performed. For several reasons, the main atomization process of diesel injection has not been fully understood, including the difficulty of entering the optically dense area. Due to the latest advances in numerical methods and computational resources, high-fidelity simulations of real atomized flows are currently feasible, which provides a new mechanism for studying jet rupture processes. In this study, a new fluid volume (VOF) the method is coupled with a random Lagrangian spray (LSP) model to simulate the atomization process. The common rail injector is modeled by the nozzle geometry provided by the engine combustion network (ECN). The operating conditions correspond to a single 90µm orifice plate JP-8. The fuel injector operates at 90 bar and 373K, and releases to 100% nitrogen, 29 bar, 300K environment, REL=16,071, Wel=75,334, so that the liquid jet is in an atomized and broken state, use the Army Research Laboratory (ARL). The experimental data set is verified, and the KH-RT breakup model is verified, both of which are related to the spray angle. The droplet distribution of the simulated spray is provided to compare and use the LSP model for future experiments secondary atomization was provided.

Jinghan Zhang. High Fidelity Simulation of Diesel Engine Spray Atomization Process. Academic Journal of Engineering and Technology Science (2020) Vol. 3 Issue 2: 48-56. https://doi.org/10.25236/AJETS.2020.030207.

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