Author(s): Cumhur Ozbey; Serhat Kucukali
Linked Author(s): Cumhur Özbey, Serhat Kucukali
Keywords: Fine Screen Form Drag Friction Drag Numerical Modeling Head Loss
Abstract: Two different bar geometries of the fine screens used at the water intakes of hydropower plants, namely the streamlined Oppermann profile and the conventional rectangular profile, were numerically investigated to determine the corresponding form and friction drag coefficients. For both bar profiles, the bar thickness and the total bar length were s = 0.006 m and L = 0.083 m, respectively. FLOW-3D software was used to perform the simulations where the Large Eddy Simulation (LES) was applied with a uniform mesh size of 0.001 m. Three different bar spacings of 4,6, and 10 mm were tested under eight different approach velocities corresponding to bar Reynolds number and Reynolds number defined for bar length ranges of 300 Year: 2025