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

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 spillw...

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Bibliographic Details
Published in:Tsinghua science and technology 2010-10, Vol.15 (5), p.574-579
Main Author: 李玲 覃春丽 彭期冬 晏智锋 高千红
Format: Article
Language:eng ; chi
Subjects:
Computational fluid dynamics
Computer simulation
Dissolution
dissolved oxygen content
environmental hydrodynamics
Fluid flow
Freshwater
Mathematical models
spillway
Spillways
Three Gorges Dam
Turbulence
Turbulent flow
water-gas two-phase flow
三峡大坝
天然气运输
数值模拟
数学模型
水库水位
泄洪道
溶解氧浓度
饱和流
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Summary: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.
ISSN:1007-0214
1878-7606
1007-0214
DOI:10.1016/S1007-0214(10)70103-6