燃烧室偏心位置对缸内流场的影响

对经过直喷化改装后的1105柴油机进行了缸内流场数值仿真计算,对不偏心与偏移量不同的偏心ω形燃烧室在不喷油情况下进行了缸内过程数值仿真计算。结果表明,燃烧室偏心虽然能使缸内气体湍流动能(TKE)和缸内平均湍流强度增大,但却使缸内总动能减小,也使缸内总动量减小得更快。

Influence of Offset of Combustion Chamber on In-cylinder Flow Field

The operation process in cylinder of a type 1105 diesel engine modified to a DI engine was simulated.The paper carried out the simulation computation for in-cylinder process with the camber offset and without fueling.The simulation results show:although the chamber offset can make the TKE and turbulence intensity increase,but it can make total kinetic energy decrease,and meanwhile it can make total momentum decrease rapidly.