摘要
本文建立了一个深度平均的水环境全场紊流模型,将流场与浓度场耦合求解以确定流场和浓度场的分布,通过数值积分得出分流比与污染物分配比。对分汊河渠不规则边界的处理,本文提出了一种新方法:区域坐标系统法。应用上述数学模型和数值方法,本文对河渠分汊点上游存在岸边排放口时分汊河段的流场和浓度场进行了计算,并着重讨论了对称分汊情况下分汊角、排放口入射动量对汊道分流比和污染物分配比的影响。所得计算结果与作者的实验资料符合较好。在此基础上,对不对称分汊情况下流量及污染物的分配也进行了初步探讨。
A depth-averaged field turbulence model for water environment is established in kthis paper. Through cou-plingly solving the flow and concentration fields, the distribution of flow field and concentration field are determined and the distribution rates of flow rate and concentration are obtained by numerical integration over the outlet sections. A new method which is called Regional Coordinate System method is put foward to deal with the irregular boundary of branching channel. Using the mathematical model and numerical method mentioned above, the turbulent flow field and concentration field of the branching channnel with a effluent inlet upstream the branching point have been numerically sovled, the effects of branching angle and momentum of effluent on the distribution of flow rate and contaminant have been discussed in this paper. The numerical results agree with the author's laboratory data finely. The distributions of flow rate and contaminant under non-symmetrical branching case have been covered.
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
1993年第1期90-96,共7页
Chinese Journal of Hydrodynamics
关键词
河渠分汊
流量
污染物
湍流模型
branching channel, turbulence mcxiel, distributions of flow rate.
