摘要
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.
出处
《水力发电学报》
EI
CSCD
北大核心
2003年第3期88-94,共7页
Journal of Hydroelectric Engineering
关键词
水力学
数值模拟
垂向二维
σ变换
自由面
hydraulics
numerical simulation
vertical 2|D f low
σ coordinate transformation
free water surface