| 过坝下泄水流中温室气体排放速率的数值模拟 |
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| 引用本文： | 黄菊萍,欧洋铭,李然,冯镜洁,李哲.过坝下泄水流中温室气体排放速率的数值模拟[J].湖泊科学,2022,34(2):664-674. |
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| 作者姓名： | 黄菊萍 欧洋铭 李然 冯镜洁 李哲 |
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| 作者单位： | 中国科学院重庆绿色智能技术研究院,重庆400714;四川大学水力学与山区河流开发保护国家重点实验室,成都610065;成都大学建筑与土木工程学院,成都610106;四川大学水力学与山区河流开发保护国家重点实验室,成都610065;中国科学院重庆绿色智能技术研究院,重庆400714 |
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| 基金项目： | 国家自然科学基金项目（52039006）、国家自然科学基金国际合作项目（51861125204）和四川省科技计划项目（2018JY0598）联合资助. |
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| 摘 要： | 当水流通过泄洪建筑物下泄时,水体中所溶解的温室气体(二氧化碳(CO2)、甲烷(CH4)等)会因为所受压力的瞬间改变而导致溶解度降低,从而造成气液之间传质的发生及水中温室气体的排放.然而,目前对于泄流条件下水中温室气体排放的研究还较为缺乏.鉴于原型观测与模型试验的局限性,本文建立了大坝泄流条件下温室气体排放速率的数学模型...
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| 关 键 词： | 温室气体 过坝下泄 数值模拟 排放速率 |
| 收稿时间： | 2021/6/5 0:00:00 |
| 修稿时间： | 2021/8/18 0:00:00 |
Greenhouse gas emission rate under discharge condition by numerical simulation |
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| Huang Juping,Ou Yangming,Li Ran,Feng Jingjie,Li Zhe.Greenhouse gas emission rate under discharge condition by numerical simulation[J].Journal of Lake Science,2022,34(2):664-674. |
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| Authors: | Huang Juping Ou Yangming Li Ran Feng Jingjie Li Zhe |
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| Institution: | Chongqing Institute of Green and Intelligence Technology, Chinese Academy of Sciences, Chongqing 400714, P. R. China;State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, P. R. China;College of Architecture and Civil Engineering, Chengdu University, Chengdu 610106, P. R. China |
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| Abstract: | The solubility of dissolved greenhouse gas (GHG), such as carbon dioxide (CO2) and methane (CH4) in water will be decreased under discharge conditions due to the sudden change of pressure, which will lead to gas-liquid mass transfer and GHG emission. However, the research about GHG emission under flood discharge conditions is still rare. Considering the limitation of prototype observation and model experiment, a mathematical model for GHG emission rate under flood discharge conditions was built in this paper. The model is based on the VOF (volume of fluid) method and takes into account the bubble mass transfer and free surface mass transfer. We simulated the transport and diffusion of dissolved CO2 and CH4 in the spillway and jet flow respectively, and calculated their concentration distribution and emission rate. The simulated results show that the concentration distribution of GHG downstream of the dam is mainly affected by the upstream inflow concentration, gas-liquid mass transfer, the transport and diffusion of dissolved GHG. Among them, the concentration of GHG in the upstream flow is the main factor affecting the emission rate downstream of the dam. This study provides a new research approach and technical base for clarifying the amount of GHG emission rate under different discharge types, and scientifically evaluating the hydroelectric carbon footprint. |
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| Keywords: | Greenhouse gas discharge through dam numerical simulation emission rate |
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