中文摘要：

污水管道中聚集着各种有害气体，当达到爆炸极限时，遇明火易发生爆炸。目前污水管道的设计基本只考虑对污水的输送，对于管道内气体计算考虑不多。利用他人所提出的数学模型进行一段污水管道通风计算，并利用CFD对比验证其准确性，所使用的软件为Fluent。通过计算，数学模型和CFD模拟结果能较好地吻合，并且发现越靠近跌水井的检查井处空气流量越大。

英文摘要：

There are various harmful gases in sanitary sewers, when reaching the explosion limit, they can easily cause an explosion. However, municipal sewers are generally designed to only transport sewage without giving consideration to gases in sewers. The ventilation in a length of sanitary sewers was calculated by using the mathematical model proposed by other people, and the accuracy of this model was validated using CFD. The software used was Fluent. The mathematical model agreed with the CFD result essentially, and the inspection shaft had a lager air flow when it was close to the drop shaft.