概述了二行程发动机换气过程数值模拟研究的发展历程和现状 ,讨论了换气过程及数值模拟研究的特点 ,指出了存在的问题及今后进一步研究的方向。 The development process and current situation of the numerical simulation of two-stroke engine ventilation process are summarized. The characteristics of the ventilation process and numerical simulation are discussed. The existing problems and the direction of further research are pointed out.