糯扎渡水电站垂向二维非恒定流的数值模拟

Numerical simulation on vertical 2-D unsteady flow of Nuozhadu hydropower station

本文针对宽深比较小 ,有关参量 (如流速、温度、浓度 )的垂向变化比水平横向的变化为大的水库 ,建立垂向二维水流数学模型 ,水深随时、空而变 ,垂向做σ变换将可变域变为规则区域。采用算子分裂法、交错网格法、有限差分法进行计算。对糯扎渡水电站的非恒定流数值模拟结果是合理的 。

In this paper, vertical 2|D hydraulic model was dev eloped for reservoirs which have small width|depth ratio and variation of relat ed parameters (such as flow velocity,temperature,concentration) is change greate r in vertical direction than in horizontal direction.In view of water depths cha nge with time and position,σ coordinate transformation in vertical direction wa s made in order to change from irregular domain to regular domain.Operator|spitt ing,staggered grid and finite difference method were used.The numerical simulati on results of unsteady flow of Nuozhadu hydropower station is reasonable.This sh ows that the model is effetive.