结合伊朗塔里干电站项目 ,将普通尾水管改型设计成窄高型尾水管。根据不同的来流条件 ,分别计算了三种工况 ,并通过CFD分析比较得出 :虽然窄高型尾水管比普通尾水管回能系数略小 ,即效率略小 ,但窄高型尾水管内的涡带比普通尾水管小 ,表明尾水管中的压力脉动小 ,其运行的稳定性好 ,窄高型尾水管可以代替普通尾水管 Combined with the Tarim dry power station project in Iran, the design of ordinary draft tube into a narrow tailrace. According to different flow conditions, three operating conditions were calculated and compared by CFD analysis: Although the recovery coefficient of the narrow tailrace is slightly smaller than that of the ordinary tailrace, that is, the efficiency is slightly smaller, but the narrow tailrace The vortex tube in the pipe is smaller than that in the ordinary draft tube, indicating that the pressure pulsation in the draft tube is small and the stability of the operation is good. The narrow draft tube can replace the ordinary draft tube