颗粒模拟技术在内燃机缸内流场计算中的应用

采用颗粒模拟技术处理气门, 不对气门单独生成网格, 而是用大量微小颗粒来模拟气门. 其模拟气门的思想是:颗粒点按气门规律运动, 在颗粒点占据的网格单元中,根据两相流动的原理,其中的气体运动停止.数值模拟结果表明,此技术简单易行,是现有条件下较为合适的气门处理方法.

The Application of Grain Simulation Technology in S.I.Engine

It's very difficult to simulate the move of valve in the 3-d simulation of air motion inside the cylinder of engine, because the valve is an obstruct to the flows and moves by certain rule, It's very important to simulate the flow of S.I engine, including the valve and so on. In this thesis, a technology of grain simulation was used. In this technology, grids of valves were not created separately but were simulated by using lots of grains. The idea was that, the grains move according to the rule of valves, and the gas stops moving as the grains lock in the grids.This technology is simple and appropriate to simulate the valves.