Numerical Simulation Of Current And Sediment Near Submerged Vanc

On the base of study the unidirectional flow, the paper makes use of numerical model to discuss submerged vanes' layout factors (submerged depth, the angle of attack and amount of vanes) for sediment transport influence in the reciprocating flow. The paper makes great efforts to generalizing the new flow-training structures.The three-dimensional numerical model can effectively simulate various layouts to flow fields and sediment transport influence in the unidirectional flow. By computing streambed sediment transport in the case of different angle and adopting momentummoment obtain an optimum angle θ = 40°; via analyzing flow-training' influenceobtain optimum submerged depth h/D = 0.3 in the case of different submerged depth; furthermore computing streambed scour-deposition in different space between two submerged vanes, we can get the best space that it is twice submerged vane height.By studying flow and sediment transport in the flume by numerical simulation, discussing working mechanism of submerged vanes in reciprocating flow, analyzing submerged vanes' layout factors (submerged depth, the angle of attack and amount ofvanes) for sediment transport influence, we can obtain an optimum angle is θ = 40°and a optimum space is 2h between two submerged vanes, respectively. The paper establish a efficient numerical method which simulate the flow field in the area affected by the vanes, bring forward the optimum design and improve its efficiency. The optimum designs show significant improvement in performance compared to the previous designs. The new designs not only reduce constructing cost but also reduce the vane-induced channel resistance. As a result, the new designs are both technically efficient and economic.