直喷式柴油机缸内气体运动模拟

Modeling of In Cylinder Flow of Direct Injection Diesel Engine

本文应用任意拉格朗日－欧拉法对直喷式柴油机缸内气体运动进行了数值模拟。此方法采用可按规定速度运动的任意四边形网格单元。计算采用２维轴对称模型，燃烧室可具有复杂的几何形状。湍流的影响用亚网格尺度湍流粘性公式模拟。本文对圆柱形燃烧室缸内空气流动、挤流作用进行了模拟，并对计算结果进行了分析。

This paper uses Arbitrary Lagarangian Eulerian Method to model the air motion inside the cylinder of direct injection diesel engine.The grids can be arbitrary.The combustion chamber is assumed to be axisymmetric,so the chamber can have some more complicated shape.A subgrid scale turbulence model including turbulent energy transport is included.The air motion and squish effect inside the cylinder of a diesel with a cylindrical bowl has been computed,and the results have been analysed in this paper.