灯泡贯流泵装置的三维流动数值模拟

为了配合南水北调东线工程淮阴三站灯泡贯流泵装置的优化水力设计研究工作,对该站前、后置灯泡贯流泵装置内部流动的数值计算方法进行了初步研究;参照该站初步设计阶段初步拟定的机组结构形式,建立了前置灯泡和后置灯泡贯流泵装置几何型体数学模型;分别对两种装置内部的流动进行三维湍流数值模拟,得到了前置灯泡和后置灯泡贯流泵装置的内、外水力特性;讨论了两种灯泡贯流泵装置进、出水流态的主要特征.计算结果表明：采用数值计算的方法研究灯泡贯流泵装置内部的三维流动及贯流泵装置的水力性能是可行的;淮阴三站前置灯泡和后置灯泡贯流泵装置初步设计方案的能量性能尚不能满足南水北调工程的要求,需通过进一步的优化计算,争取实现可能的最高装置效率.

Numerical study of 3D flow in a bulb Tubular pump system

In order to have the optimum hydraulic design for a bulb tubular pump system of Huaiyin No. 3 pumping station in the South-to-North Water Diversion Project, the numerical simulation for 3D flow pattern in the bulb tubular pump system is conducted. The mathematical models of the geometrical molded line of both bulb front-positioned and rear-positioned tubular pump system are built up according to the recommended structural configuration of the pump unit of the station at the stage of initial design. Numerical simulations of 3D turbulence flow in the two types of pump systems were respectively completed successfully, from which the internal and external hydraulic performances of the bulb tubular pump systems were found out. The main characteristics of flow patterns in the inlet and outlet of both bulb front-positioned and bulb rear-positioned tubular systems were discussed. The simulation results signify that it is realizable to apply numerical calculation to study 3D flow pattern and its hydraulic performance in a bulb tubular pump system. The energy characteristic of the bulb tubular pump system of the initial design of Huaiyin No. 3 pumping station is not satisfied for the requirements of South-to-North Water Diversion Project. However, it is possible to obtain higher efficiency of the pump system by the way of further optimum calculation.