摘要
海上温排水会导致所处水域水体温度升高,长期排入大量高温水体,势必会对周围生态环境产生不利的影响,因此研究温排水扩散规律的影响范围对于防止海洋环境热污染具有重要的意义。首先根据温排水的基本理论及热扩散特征,建立了温排水排放的三维数学模型,接着利用FLUENT软件对温排水排放过程进行了数值模拟,模拟结果显示,在温排水受纳水体的流速一定时,排水量越大,温排水的影响面积越大;受纳水体水流速越快,温排水影响面积越小;当排水量及受纳水体的流速改变时,各工况下高温升区域都集中在近区,且温升包络面积相差很小,随着温排水的混合扩散,远区的温升逐渐减小,此时对应的温升包络面积逐渐增加,且最大包络面积出现在温升1~2℃时。
Offshore warm drainage will cause the temperature of the water body in this area to rise,and it will be discharged into a large number of high-temperature water bodies for a long time,which is bound to have an adverse impact on the surrounding ecological environment.Therefore,it is of great significance to study the diffusion law of warm drainage and control the influence range of temperature rise in the discharge water area to prevent thermal pollution of marine environment.Firstly,according to the basic theory and heat diffusion characteristics of warm drainage,a three-dimensional mathematical model of warm drainage was established.Then,the numerical simulation of warm drainage was carried out by using FLUENT software.The simulation results show that when the flow velocity of the receiving water body of warm drainage is constant,the greater the discharge,the greater the affected area of warm drainage.The faster the flow velocity of receiving water body,the smaller the affected area of warm drainage.When the displacement and the flow velocity of the receiving water body change,the high temperature rise area is concentrated in the near area under various working conditions,and the difference of temperature rise envelope area is very small.With the mixing and diffusion of temperature drainage,the temperature rise in the far area gradually decreases,and the corresponding temperature rise envelope area gradually increases,the maximum envelope area occurs at the temperature rise of 1~2℃.
作者
杨勇
王加龙
许伟
乐波
晁阳
魏杰儒
Yang Yong;Wang Jialong;Xu Wei;Le Bo;Chao Yang;Wei Jieru(State Grid Economic and Technological Research Institute Co.,Ltd.,Beijing 102200,China;Guangzhou Goaland Energy Conservation Tech.Co.,Ltd.,Guangzhou 510663,China;C-EPRI Electric Power Engineering Co.,Ltd.,Beijing 102200,China)
出处
《机电工程技术》
2022年第3期307-310,共4页
Mechanical & Electrical Engineering Technology
关键词
温排水
数学模型
数值模拟
温度分布
生态环境
thermal discharge
mathematical model
numerical simulation
temperature distribution
ecological environment
