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根据已有文献对密排加糙壁面水跃共轭水深、水跃旋滚长度、水跃长度的试验结果,分析了密排加糙壁面水跃的共轭水深、水跃旋滚长度、水跃长度、壁面平均切应力随弗劳德数、跃前和跃后断面水深、壁面粗糙度的变化规律;给出了人工粗糙壁面水跃共轭水深、水跃旋滚长度、水跃长度、壁面阻力系数、壁面平均切应力的计算公式;通过已有文献的试验结果对公式进行了验证,得到了水跃共轭水深的平均误差为4.06%,水跃旋滚长度和水跃长度的平均误差分别为4.25%和7.16%。研究表明:人工粗糙壁面水跃的共轭水深和水跃长度随着跃前断面弗劳德数的增大而增大,随着壁面粗糙度的增大而减小;壁面平均切应力随着壁面粗糙度和跃前断面弗劳德数的增大而增大,随着共轭水深比的增大而减小。
Based on the experimental results of the hydrothermal conjugate water depth, the hydrodynamic length and the hydrodynamic length of the rough walled surface, the conjugate water depth, the hydrodynamic length of the water jump, the water spin length, Length of jump, the average shear stress of the wall with the Froude number, the variation of water depth and wall roughness before and after the jump, the hydrodynamic conjugate water depth, the water spin length, the water jump length, Wall resistance coefficient and wall average shear stress. The formula was verified by the experimental results of the existing literatures. The average error of the water-jump conjugate water depth was 4.06%. The average of the hydrodynamic spin-rolling length and the water-jump length The errors are 4.25% and 7.16% respectively. The results show that the conjugate water depth and the length of water jerk of artificial rough wall surface increase with the increase of Froude number in the frontward section, and decrease with the increase of wall roughness. The average wall shear stress decreases with the increase of wall surface roughness The wall roughness and Froude number of the frontward section increase with the increase, and decrease as the conjugate water depth ratio increases.