泵站钟形进水流道三维湍流数值模拟与试验研究

3-D Turbulent Numerical Simulation and Experiment Study on Bell-like Suction Box in Pumping Station

采用雷诺方程(RANS)和标准k-ε湍流模型,数值模拟了钟形进水流道6种不同喇叭管悬空高度和4种不同流量方案下的流道内流场,分析了钟形进水流道关键部位的流态特征,揭示了钟形进水流道特征断面的速度分布规律。采用五孔探针实测了流道特征断面流速分布,并以流道出口速度均匀度和速度加权入流角为目标函数,分析比较了各方案的数值计算与试验实测结果,提出了钟形流道喇叭口悬空高的合理取值范围。

Reynolds-averaged equations and the s internal flow pattern in bell-like suction box of schemes including six different The velocity vectors on special heights from the cross section are tandard large p bottom reveale k-ε turbulent model are applied to simulate the umping stations. The series numerical simulation floor to the open and four flow rates are designed. d and the velocity distribution laws are obtained. The velocity distribution is probed by a 5 - hole globe probe system on the outlet section of bell-like intake conduit. Regarding velocity distribution uniformity and velocity-weighted average swirl angle as objective criterion and comparing the numerical calculated results with experimental data,a reasonable range of the bell-like suction height （or clearance from floor） is put forward.