摘要
为了研究计算流体动力学方法确定阻抗式调压井阻抗系数的可行性,本文选用适合调压室流动的可行化k_ε湍流模型及考虑边壁粗糙度的壁函数,用二阶精度算法对T形岔管、管内孔口、突扩管和阻抗式调压室的流场进行了数值模拟。经比较发现采用计算流体动力学方法计算所得的结果在水头损失方面可达到与常规模型试验结果同等的精度,表明计算流体动力学可以应用于调压室的设计计算中。
The realizable k-ε model for turbulent flow is applied to numerically simulate the flow fields in T-type bifurcation, sudden expansion, orifice within a pipe and throttled surge tanks. The logarithmic law wall function is adopted to deal with the boundary layer. It is found that the accuracy of the calculated hydraulic resistance coefficient of throttled surge tank is the same as the model test result. As an example, the calculation for the surge tank in tail water tunnel of a pumped storage power station is presented.
出处
《水利学报》
EI
CSCD
北大核心
2005年第7期787-792,共6页
Journal of Hydraulic Engineering
关键词
计算流体力学
水电站调压室
阻抗系数
hydraulic resistance coefficient
throttled surge tank
computational fluid dynamics
realizable k-ε turbulence model
