竖井贯流泵进水流道的数值模拟研究

Numerical simulation of shaft tubular pump inlet duct

基于标准k-ε湍流模型,采用雷诺时均N-S方程和SIMPLE算法,通过针对不同竖井线型参数下竖井贯流泵进水流道进行三维数值模拟,展现了各方案进水流道出口断面的轴向速度分布、水平剖面的流线和压力分布以及流道水力损失的状况.通过比较发现:流道过渡平缓时,流道的水力损失性能较好;各方案出口断面上的速度分布呈现为对称分布;由于3种方案的水力损失性能相差不大,考虑到工程的经济性,选择方案1作为最终方案.

Based on the Standard k-εturbulence model,with the Reynolds averaged N-S equations and the SIMPLE algorithm,the inlet duct of the shaft tubular pump with different design parameters is simulated.The flow pattern in the inlet passage,the velocity distribution of the feature section and the hydraulic losses with different design parameters are showed in the article.On the contrast,the conclusion below can be got:(1)The smoother the lateral design line of the shaft is,the better the performance of the hydraulic losses is.(2)The velocity distribution of each case presents as a symmetrical distribution.(3)There is little difference among the hydraulic performance of the three cases.Choose case 1 as the final case,considering the economics of the project.