High-fidelity simulation of primary breakup of a "spray G" gasoline jet with an adaptive mesh refinement and volume-of-fluid method
Efficient atomization of a gasoline jet is essential to the performance of gasoline direct injection (GDI) engines. This paper presents a numerical investigation of the primary breakup of a gasoline surrogate jet. The fuel properties and injection condition are chosen based on the X-ray experiment performed at Argonne National Lab (Duke et al, Exp. Therm. Fluid Sci., 88:608-621, 2017). The surrogate fuel has a low volatility and thus no phase change occurs in the atomization process. The nozzle geometry and operation conditions are similar to the Engine Combustion Network (ECN) ``Spray G". We focus the present study on the near field where inter-jet interaction is of secondary importance. Therefore, we have considered only one of the eight jets in the original Spray G injectors. The liquid is injected from the inlet into a chamber with stagnant gas. To mimic the internal liquid flow in the original injector, an angle is introduced between the liquid inflow and the inner hole axis.