介绍了现有的自然通风模拟软件，分析了其共性和差异。以国家游泳中心为例，详细介绍了自然通风模拟技术的应用。国家游泳中心采用机械辅助自然通风方式，在节能设计中利用了建筑环境集成模拟软件Visualesp-r，以建筑物综合能耗为目标函数，模拟确定了最优通风模式。模拟预测的结果与现场实测结果非常吻合。

Presents the existing simulation softwares of natural ventilation, and analyses the commonalities and differences. Taking the National Aquatics Centre as example, presents the application of natural ventilation simulation technology in detail. The National Aquatics Centre adopts the mechanical aided natural ventilation mode, and applies integrated building environment simulation software Visualesp-r to simulating and determining an optimal ventilation mode in energy saving design. The simulation results agree well with the field measured results.