Numerical Simulation of Dissolved Oxygen Supersaturation Flow over the Three Gorges Dam Spillway  

作　　者：李玲 覃春丽 彭期冬 晏智锋 高千红 

机构地区：[1]State Key Laboratory of Hydroscience and Engineering, Tsinghua University [2]China Institute of Water Resource and Hydropower Research [3]Centre of Water Environmental Monitor of Yangtze River Three Gorges Project

出　　处：《Tsinghua Science and Technology》2010年第5期574-579,共6页清华大学学报（自然科学版（英文版）

基　　金：Supported by the National Key Basic Research and DevelopmentProgram (973) of China (No 2006CB403304);State Key Labo-ratory of Hydroscience and Engineering Program of China (Nos2008-TC-1 and 2009-TC-2)

摘　　要：The dissolved oxygen concentration in a flow changes with distance downstream of the spillway crest and depends on the geometric configuration of the spillway and the hydraulic and operating conditions.A mathematical model was developed to simulate the turbulent structure of the flow over the spillway of the Three Gorges Dam at the 145 m reservoir water level to study the aeration characteristics and the gas transport.The model was calibrated and verified with measured data.The analysis of distribution of the aeration and the dissolved oxygen showed that the downstream water level,upstream dissolved oxygen content,and the flow discharge all affect the dissolved oxygen saturation downstream of the sluicing dam.The simulation provides guidance for controlling the dissolved oxygen supersaturation and environmentally friendly operation of the Three Gorges Dam.The dissolved oxygen concentration in a flow changes with distance downstream of the spillway crest and depends on the geometric configuration of the spillway and the hydraulic and operating conditions.A mathematical model was developed to simulate the turbulent structure of the flow over the spillway of the Three Gorges Dam at the 145 m reservoir water level to study the aeration characteristics and the gas transport.The model was calibrated and verified with measured data.The analysis of distribution of the aeration and the dissolved oxygen showed that the downstream water level,upstream dissolved oxygen content,and the flow discharge all affect the dissolved oxygen saturation downstream of the sluicing dam.The simulation provides guidance for controlling the dissolved oxygen supersaturation and environmentally friendly operation of the Three Gorges Dam.

关 键 词：environmental hydrodynamics dissolved oxygen content SPILLWAY Three Gorges Dam water-gas two-phase flow 

分 类 号：TV122[水利工程—水文学及水资源]