本文应用传热学理论对二滩电站通风竖井事故排烟时的烟气温降进行了分析,并在烟气入口温度为400℃,体积排烟量为7×10~4 m~3/h,竖井初始壁温为23℃,连续排烟时间为1小时的条件下,利用计算机求得了沿竖井高程烟气温度分布的数值解。解的结果表明:在满足上述条件的情况下,二滩电站通风竖井的烟气出口温度不超过32℃.这一结论对该电站通风竖井排风机系统的设置具有指导意义。 In this paper, the heat transfer theory is used to analyze the smoke temperature drop during the ventilation accident in Ventilation Shaft of Ertan Hydropower Station. The inlet temperature of the flue gas is 400°C, and the volume of exhaust smoke is 7×10~4 m~3/h. The initial temperature of the shaft was 23°C, and the continuous exhaust time was 1 hour. The numerical solution of the temperature distribution of the flue gas along the shaft height was obtained by computer. The results of the solution show that the flue gas outlet temperature of Ventilation shaft of Ertan Power Plant does not exceed 32°C under the above conditions. This conclusion has guiding significance for the setting of the ventilation shaft exhaust fan system in the power plant.