灯泡贯流泵装置的优化水力设计

采用CFD理论应用Fluent软件对某低扬程泵站灯泡贯流泵装置进行了三维湍流数值模拟及其优化水力设计,并采用透明流道模型试验验证了该优化设计.研究结果表明:灯泡贯流泵进、出水流道的控制尺寸及过流边界的形线对贯流泵装置的水力性能具有较为明显的影响;借助于三维湍流数值模拟方法可逐步优化其水力性能,且在设计流量下工作时的流道水力损失可控制在较小的范围内.前置灯泡贯流泵装置具有更好的水流条件,其水力 性能优于后置灯泡贯流泵装置.采用数值模拟得到的贯流泵装置流道的内部流态及其水力损失与流道模型试验得到的结果基本一致,表明采用数值模拟方法得到的灯泡贯流泵装置优化水力设计的结果是可信的.

Optimal hydraulic design of bulb tubular pump system

The Fluent software of computational fluid dynamic is applied to carry out the numerical simulation of 3 D turbulent flow in a low head bulb tubular pump and to optimize the hydraulic design. Model test with transparent wall is conducted to verify the optimized design system. The study result shows that the control dimensions of the inlet and outlet of the pump as well as the configuration of the flow boundary may greatly affect the hydraulic performances of the pump system. By means of 3 D numerical simulation the hydraulic loss of the flow passage during the pump working at the design discharge can be controlled to a very small magnitude. The hydraulic loss and internal flow pattern of the pump computed by numerical simulation are in good agreement with the model test result.