Effect of Different Types of Nozzles of Common-Rail Diesels on Fuel Injection Spray and Combustion Characteristics
Wang Zhilei;Liu Wenbin;Wu Yalong;Song Yang;Henan Diesel Engine Industry Co., Ltd.;
The CFD software was used to simulate the inner flow and spray characteristics of injectors with Euler and Lagrange method, and the injection simulation results were input to the combustion model to realize co-simulation. The injection characteristics of varied types of nozzles were simulated to get the internal velocity, pressure, gas phase volume fraction(cavitation) and spray field. The simulation results show that under the same common rail pressure, the nozzles with small orifice produces high fuel drop velocity, long penetration distance and small spray angle, and causes big combustion turbulence kinetic energy,thus more soot particles hit the cylinder head, which has a bad influence on the reliability of diesel engines.
【CateGory Index】： TK421.2