Analysis of geometric parameters of Y-shaped diversion piers on flow pattern in the fbrebay of the side-intake pump station
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Abstract:
In order to improve the flow pattern in the forebay of the side-intake pumping station, the numerical simulations were performed on the forebay of the sidointake pumping station with no rectifying measures and settings of Y-shaped diversion piers using CFX software and RNG ks turbulence model. An analysis of the influence of the position,height,angle, and length of the Y-shaped diversion piers on the improvement of the flow pattern in the forebay of the sidointake pump station were car ried out. Numerical results indicated that if there was no rectification measure, then there was a large area of recirculation in the left area of the forebay of the pumping station. The water flow deflection on the right side of the pumping station was very obvi ous ,which had an adverse effect on the unit. The Y-shaped diversion pier had a shunting effect. The velocity of flow can be sig nificantly uniform by arranging the Y-shaped pier in front of the inlet pool. The recirculation zone could be eliminated? and the water flow could flow into the units more evenly. It was found that the flow pattern in the forebay of the side-intake pumpingstation significantly improved, and the approach velocity distribution before the inlet pool was more uniform when the Y-shaped diversion pier was located at 33. 33D0 in front of the inlet pool and the height was 1. 11DO , the angle was 120°and the length was 2. 78D0，respectively.
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