بررسي جريان در سرريزهاي استوانه اي

Flow Characteristics Over Cylindrical Weirs

Study of flow characteristics over cylindrical weirs is very important in design and application of such structures due to high curvature in their streamlines. In this research, flow conditions for cylindrical weirs and the effects of some factors like diameter of the weir, hydraulic head and downstream depth on the discharge coefficient for developing of its equation by experimental approaches were investigated. The tests were performed on the weirs with different diameters and flow rates. The results of tests showed that the discharge coefficient of cylindrical weirs is greater than the other broad-crested oneʹs. It increases in a power relationship with increasing the ratio of total head in upstream to the diameter of the weir. Also the submergence threshold with 0.5 to 20 liters/second flow rates is 0.7-0.89.