园林不规则池塘水力循环的运行方案分析与选择研究

Research on Analysis and Choice of Manual Hydraulic Circulation Operation Conditions in Irregular Ponds in Garden

园林池塘水面变化极不规则,采用有限体积法对实施人工水力循环的园林池塘水体流动数学模型进行求解.提出了各种运行方案,并针对不同运行工况下水体滞流、中心水域流速及水流均匀性问题进行深入分析与研究.结果表明,一个出水口为另一出水口流量1/12时,中心水域流速最大;一个出水口为另一出水口流量的1/3时,园林池塘水流最为均匀;一个出水口流量为另一出水口流量的1/6时,园林池塘水流较均匀,中心水域流速较大,为最佳运行工况.

The shape of ponds in classical gardens is irregular. In order to analyze the flow field in irregular garden ponds under different operation conditions,a mathematical hydrodynamic model was solved using the finite volume method. Different conditions were identified. The problems as the stagnancy of water, non-uniform flow, and the extremely small velocity in central ponds were further analyzed and researched. The results indicate that, by regulating the manual hydraulic circulation system, a condition with biggest velocity in central ponds can be obtained under which the discharge at one outlet is 1/12 of the discharge at the other one,a condition with uniform flow can be obtained under which the discharge at 1/3 of the discharge at the other one, and an optimal condition with both big velocity in central ponds and uniform flow can be obtained under which the discharge at 1/6 of the discharge at the other one.