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复杂地质条件下,为提升长距离输水工程运行效率,可充分运用倒虹吸工程等工程技术。以北疆三个泉供水工程中的三个泉倒虹吸管道工程为研究对象,将流量固定为Q=23.8 m3/s和Q=26.25 m3/s,运用FLUENT软件构建倒虹吸管道数值模型,对流体深度、流体压力分布以及流体速度等展开分析。结果表明,合理设置粗糙度非常重要;在相同的流量下,网格间距约为3 m时,能节省计算时间并合理控制计算误差;三个泉倒虹吸大流量运行时,可用两根管代替3根管用于输水工程,从而节省投资。
Under complicated geological conditions, in order to enhance the operating efficiency of long-distance water conveyance projects, engineering technologies such as inverted siphon project can be fully utilized. Taking the three springs inverted siphon project in Sanjianquan water supply project in northern Xinjiang as the research object, the flow rate was fixed at Q = 23.8 m3 / s and Q = 26.25 m3 / s. The numerical model of inverted siphon pipeline was constructed by using FLUENT software. Fluid depth, fluid pressure distribution and fluid velocity analysis. The results show that it is very important to set the roughness reasonably. Under the same flow rate, when the grid spacing is about 3 m, the calculation time can be saved and the calculation error can be reasonably controlled. When the three spring inverted siphon flow rate is high, 3 pipes for water conveyance, saving investment.