中文摘要：

通风就是室内外空气互换。有效的机械通风和合理的气流组织对于改善室内空气质量、控制室内空气污染物浓度、保证实现健康建筑有着重要意义。针对某房间安装换气扇的两种换气方式-压入式送风和抽出式排风，建立物理模型和数学模型，并用CFD软件进行了数值模拟，从而得到两种换气方式下的速度矢量图和速度云图，并分析了不同换气方式对室内气流的影响。通过比较，压入式送风方式换气效果更好。

英文摘要：

Ventilation is the exchange of indoor and outdoor air. Effective mechanical ventilation and a reasonable air flow have great significance to improve indoor air quality, control of indoor air pollutant concentrations, to ensure the realization of the health building. Based on the two ventilation methods in an installed ventilation fans room-press-air ventilation and exhaust ventilation, the physical models and mathematical models were presented in this paper. Used CFD software to simulate the two ventilation methods, obtained velocity vector and speed cloud picture, and analyzed the influences of different ventilation methods meant to the room air. By comparison, press-air ventilation is better.