采用正交试验设计的方法和CFD模拟技术考察在过渡季节，中庭两侧门是否关闭，来流风向以及来流风速大小这三个因素对室内气流组织的影响；研究最不利工况自然通风条件下的室内气流组织分布；对自然通风的时间尺度节能率进行了评估。结果发现在过渡季节，对于室内气流组织，中庭两侧门是否开启和来流风速的影响力相当，而来流风向影响最小。即中庭两侧门打开，来流风与通风口垂直时的自然通风效果最好；中庭两侧门的打开对充分利用室外空气消除室内负荷，延长自然通风时间，提高室内舒适度和空气品质具有重要意义；正常情况下，全年至少有三分之一的时间可以实现自然通风，自然通风状况良好。%Effects of three facts （whether side doors are closed, direction of the coming wind and its velocity） on air distribution were researched by orthogonal experimental design and CFD simulation in transition season. Air distribution of the most unfavorable conditions was also studied, and the energy-saving rate was valuated from the time point of view. The results show that facts of if side doors are closed and velocity of coming wind have almost the same influence on the air distribution while the effect of direction of the wind is weakest. It is meaningful to open the side doors because it can remove indoor load, extend natural ventilation time, improve thermal comfort and indoor air quality effectively. Natural ventilation can last one third of the year, which is quite energy efficient.
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