Research on Hydraulic Characteristics of Cutthroat Flume in Irrigation District
In the background of the cutthroat flume of the second stem II station in the Ye River hub of Shijiazhuang, the model test is selected to analyse the hydraulic characteristics of the cutthroat flume. The results show that: (1) The influencing factors on the discharge coefficient in the calculating formula for flow deduced by theory are drawn, the discharge coefficient of the free outflow is relevant to the head above weir and the height of weir, and that of the submerged outflow has relevance to the height of weir and the upstream and downstream water level; (2) the critical condition for the submergence of cutthroat flume is determined, when the ratio of the water depth in the downstream and upstream is less than 0.76, the flow is free outflow, otherwise it is submerged outflow; (3) Based on the regression analysis, the empirical formula of discharge coefficient for the free outflow and submerged outflow are obtained, and the precision is proved to be reasonable by the error analysis.
Q. L. Qi et al., "Research on Hydraulic Characteristics of Cutthroat Flume in Irrigation District", Applied Mechanics and Materials, Vol. 137, pp. 227-231, 2012