Author(s): Yue Jun Chen, Zong Fu Fu, Zhen Cui, Shan Wang, Guang Gang Ma, Wen Jiang, Yao Wang, Xue Han Qiu
Linked Author(s): Yue Jun Chen
Keywords: Numerical simulation, short-crested weir, upstream side slope coefficient, free overflow, discharge coefficient.
Abstract: Numerical simulation based on the RNG turbulent model has been used to systemically study the effects of varying upstream side slope coefficient in the range of 2H: 1V to V (vertical) on discharge coefficient of rectangular profile short-crested weirs for free overflow conditions. The results were compared with measurements from physical model experiments, using different total energy head, . Upstream overflow total energy head, varying from 8. 0 cm to 24. 0 cm slightly increased the discharge coefficient, but decreased the influence of degree of upstream side slope on discharge coefficient. For constant , the rectangular short-crested weir with sloped upstream face had a convex parabola relation between the increasing upstream side slope coefficient and the corresponding discharge coefficient. The discharge coefficient formula of rectangular short-crested weirs including the variable of upstream side slope coefficient, was derived. This formula not only improved calculation accuracy of discharge coefficient, but also provided references for the structural design of rectangular profile short-crested weir
Year: 2017