中文摘要：

泥沙需氧量（SOD）为河口、海湾、河流和湖泊等水域水质分析、水质数学模型中的试值较为可信.为了合理设计SOD现场测试仓,选择常用的圆柱形仓这种典型的SOD测试仓,采用基于RNG方法的κ-ε双方程紊流模型,求解仓内水流三维流场,分析3种进水型式仓内水流运动情况.根据数学模拟结果分析,考虑SOD现场测试的要求,提出较为合理的现场测试仓布置方式.数学模型计算结果得到了实验室测量值的比较和验证.

英文摘要：

Sediment Oxygen Demand （SOD） is the key parameter for water quality analysis and water quality numerical simulations in water bodies such as estuaries, bays, rivers and lakes. It is believed in general that the SOD value measured in situ is more reliable than in laboratory. In order to design the SOD measurement chamber suitably, the authors numerically simulated the three-dimensional flow in the cylindrical SOD measurement chambers, which in situ measurement commonly used, by using RNG-based k-~ double equation turbulence model. The SOD chambers with three kinds of flow inlet types are analyzed. Based on the simulation and analysis, the best flow inlet type is put forward to meet the requirement of are compared and validated by laboratory tests. SOD in situ measurement. The numerical simulation results.