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复杂地质地貌条件下,长距离输水工程可以充分运用倒虹吸工程来提升工程运行效率,降低工程难度和成本。以新疆小洼槽倒虹吸工程为研究对象,在流量固定为Q=16.37 m3/s、粗糙度取不同值条件下,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流动参数的变化展开分析。结果表明,倒虹吸管道壁面粗糙度与流体深度、流体压力呈同向变化,与流体速度呈反向变化;为确保工程效率和安全,须将倒虹吸管道粗糙度控制在0.000 02 m以下。
Under the conditions of complicated geology and geomorphology, long-distance water conveyance project can make full use of inverted siphon project to improve project operation efficiency and reduce project difficulty and cost. Taking Xiaoqiu inverted siphon project in Xinjiang as the research object, under the conditions of constant flow rate Q = 16.37m3 / s and different roughness values, the numerical simulation model of inverted siphon was established by using Fluent software. The effects of fluid depth, fluid pressure distribution and fluid Speed and other flow parameters of the analysis. The results show that the surface roughness of the inverted siphon pipe changes in the same direction with the fluid depth and the fluid pressure, and changes inversely with the fluid velocity. To ensure the engineering efficiency and safety, the roughness of the inverted siphon pipe must be controlled below 0.000 02 m.