内燃机进气道及缸内气体的流动是一种十分复杂的三维湍流运动,对燃油的喷射、混和气体的形成、燃烧和排放有重要影响.利用数值模拟方法是了解气流运动、发展变化规律及气流与燃烧关系的主要手段之一.采用瞬态咬合法模拟气阀和活塞的运动,采用分块划分网格技术形成计算域的整体网格.微分方程的计算求解基于KIVA-3程序,加入以上子程序,计算针对四冲程柴油机的进气过程进行模拟计算.
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