含盐废水尾水排放对近水域盐升分布影响的数值模拟研究

Numerical Simulation on Effect of Saline Wastewater Discharging Ways on Salt-Rise Distribution nearby the Outfall

[目的]研究含盐废水尾水在不同排放方式下对江河近水域盐升分布的影响。[方法]运用FLUENT软件构建了缓流条件下淹没单口、淹没双口、非淹没单口、非淹没双口4种尾水排放方式下的盐升分布三维数学模型,得出了4种排放方式下排放口近水域的盐升分布规律,对各种排放方式下的最大盐升值和盐升均值进行比较分析。[结果]淹没双口排放方式优于淹没单口排放方式,非淹没双口排放方式优于非淹没单口排放方式。[结论]对近水域盐升分布影响最小的排放方式为非淹没双口排放方式。

[ Objective] In order to study the effect of saline wastewater discharging ways on sah-rise distribution nearby the outfall. [ Method] Four three-dimensional numerical models of discharging ways which were single-port submerged-type, double-port submerged-type, single-port unsubmerged-type and double-port unsubmerged-type in the condition of subcritical flow were researched based on FLUENT. The range of salt content rise of the tbur discharging ways could be concluded according to the simulation ~sults. The value of maximum salt concentration and average salt concentration of the discharging ways were compared and analyzed. [ Result] The results showed that double-port submerged-type discharging way was better than single-port submerged-type discharging way, while double-port unsubmerged-type discharging way was better than single-port unsubmerged-type discharging way. [ Conclusion] It was found that double-port unsubmerged-type discharging way had the least influence on salt-rise distribution nearby the outfall.