为探究双迷宫流道灌水器内部结构变化对其水力性能的影响，以其竖向流道左侧不同单内齿位置及内齿高度组合为靶向，基于CFD软件建立灌水器水力性能数值模拟模型，计算了9种进口压力下，15种单内齿位置与高度组合的水力性能指标，并通过与同结构的物理试验进行验证，结果表明：无论单内齿位置如何变化，灌水器的流态指数总是随单内齿高度的增加呈先增大后减小趋势，流量系数随单内齿高度的增加呈递减趋势；对于相同的单内齿高度，灌水器流态指数随单内齿在竖向流道的位置由高到低呈先增后减的趋势，而流量系数随单内齿位置变化的影响较小；当单内齿位置在竖向流道左下侧，且内齿高度为0.5mm时，灌水器流态指数最小，水力性能好。

In order to explore the influence of inner structural change of douche of double maze runner on its hydraulic performance，taking different combinations of position and height of single inner tooth on the left side of vertical runner as study target，the hydraulic performance indexes of toothless maze runner with the combination of fifteen kinds of position and height of single inner tooth under nine types of inlet pressure were calculated based on CFD software to establish numerical simulation model of hydraulic performance of douche． The result was verified through physical experiment of the same structure． The results indicate that flow stance index of douche increases and then decreases with the increase of single inner tooth height，while discharge coefficient presents decline trend with the increase of single inner tooth no matter how position of single inner tooth changes; for the same height of single inner tooth，flow stance index of douche presents trend of increase and then decrease with the change of single inner tooth height in vertical runner from high to low，while the impact of discharge coefficient with position change of single inner tooth is small; when the position of single inner tooth is at the left lower side of vertical runner and the height is 0．5 mm，flow stance index of douche is the minimum and the hydraulic performance is good．