بررسي نقش تيغه هدايت كننده عرضي در افزايش راندمان تله اندازي حوضچه رسوبگير مستطيلي با ورودي ناگهاني

Experimental study of the effect of Transverse Baffle on the Trap Efficiency of Rectangular Settling Basin with a sudden expansion inlet

The rectangular settling basin is one of the common hydraulic structures, especially in irrigation systems, which is used for the separation of suspended sediments from sediment laden flow. In this study die effect of a submerged flat plate normal to the flow direction, on the trap efficiency of a settling basin was experimentally investigated. The results indicate that in 3D conditions in which the incoming jet travels a considerable distance from die inlet and causes large variations of transverse velocity in the basin, installing the baffle in a relative submergence of 20% and a relative distance of 6% can increase the trap efficiency of the settling basin by up to 12%. This may be attributed to the role of the baffle in decaying the kinetic energy of the impinging jet and spreading the sediment particles in the width of the settling basin.