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采用变坡实验水槽,研究了坡面流阻力系数与粗糙度、雷诺数、弗劳德数、单宽流量和坡度的关系。结果表明,阻力系数随着粗糙度增大而呈指数函数增大;阻力系数与雷诺数和弗劳德数均成较好的幂函数关系,幂指数在-1左右变化,系数随着粗糙度的增大而增大;阻力系数随着放水流量增大而减小,随着坡度的增大而增大。
The experimental data of slope resistance, roughness, Reynolds number, Froude number, single-width flow rate and slope were used to study the relationship between flow resistance and slope. The results show that the drag coefficient increases exponentially with the increase of roughness. The drag coefficient has a better power function relationship with Reynolds number and Froude number. The power index changes with -1, and the coefficient increases with the roughness The resistance coefficient decreases with the increase of discharge flow rate, and increases with the increase of slope.