Study on Hydraulic Characteristics of Horizontal and Vertical Cross Inlet

Inlet with horizontal and vertical discharge channels, as a new type, has certain advantages in flood discharge and diversion of water conservancy and hydropower engineering, but the water flow in this inlet is more complicated and lacks relevant systematic research. In this paper, a two-dimensional hydrodynamic mathematical model is used to investigate the hydraulic characteristics such as flow rate and velocity of each channel with respect to the area and head of horizontal and vertical diversion channels. According to the results, under different head ratios, confluence ratios are proportional to head ratios; however, the Froude number of horizontal hole and shaft are inversely proportional to head ratios. When the head ratios reach a certain extent, confluence rations and the Froude number tend to be a constant. In addition, under different area ratios, as the area ratios grow, the confluence ratios and the Froude number increase.