明渠岸边侧向取水的/ 取水角效应0研究

从理论分析、水槽试验和数值模拟计算等多方面、多角度，对明渠岸边侧向取水的“取水角效应”进行了定量研究。“取水角效应”指取水角度的改变对取水门附近水流结构的影响。研究结果表明，取水角度的大小对取水口近区水域的水流结构影响非常显著。在30°～90°的范围内，取水角度越小，口门断面处的流速分布越均匀，口门上游主槽内的相对分流宽度越小，分槽断面内的净进流宽度越大，取水近区的流线越为平顺，取水口的取水防沙条件越好。

Study on diversion angle effect on lateral intake flow

The diversion angle effect on lateral intake flow in open channels, which is defined as the diversion angle effect, was studied by means of theoretical analysis, laboratory flume experiment and numerical simulation. It is demonstrated that the variation of the diversion angle has a significant influence on the intake flow characterist ics. The study results show that with decreasing of the diversion angle from 90b to 30b, the intake flow is getting more uniform at the entrance section; the relat ive diversion width of the main flow upstream of the intake is reducing; the net inflow width in the intake is becoming lager; the streamlines are appearing more smooth in the diversion region; and more sediment can be guided away far from the intake.