Investigating Effect of Inlet Shape on the Flow Pattern and Vortex Generation Around Inlet of Intake Using Numerical Model

Flow separation at upstream of the inlet is one of the major problems that occurs in the intakes. The reason for this، which results in reduction of intake efficiency and sedimentation in front of the intake inlet، is the velocity difference at the upstream and downstream of the inlet. The velocity difference creates a separation zone at which flow circulation prevents the flow transition resulting in accumulation of sediments at the inlet of intake. One of the best methods to increase intake efficiency and eliminate vortices is to determine the optimal hydraulic conditions. Any method producing a uniform velocity between upstream and downstream of the inlet، reduces the secondary flow، separation zone، sedimentation and hence increases the intake efficiency. In this study a numerical model (SSIIM 2. 0) was applied to determine the optimal hydraulic conditions.