为更准确地计算平底差动坎的水舌挑距,对平底差动坎进行了物理模型试验,采用水舌运动轨迹公式估算差动坎水舌挑距,并根据理论分析和模型试验结果,修正了上股水舌挑距估算公式中的出射角及下股水舌挑距估算公式中的出射流速,由此得到了系列差动坎水舌挑距估算公式,其计算值与试验值吻合良好,误差控制在10%以内,可为工程设计提供参考。 In order to more accurately calculate the water tongue tilt distance of the flat bottom differential ridge, the physical model test was conducted on the flat bottom differential ridge. The water tongue tongue offset distance was estimated by using the water tongue motion path formula. According to the theoretical analysis and model test results, Corrected the exit angle in the formula for estimating the offset of the upper water’s tongue and the exit velocity in the formula for estimating the offset of the lower water’s tongue, Good, error control within 10%, can provide reference for engineering design.