泄洪雾化的雾流源强和扩散数学模型研究  

Mathematical Model of Fog Flow Source Strength and Diffusion in Flood Discharge Atomization

作　　者：何贵成 张华[1] 彭燕祥 HE Gui-cheng;ZHANG Hua;PENG Yan-xiang(School of Water Resources and Hydropower Engineering,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学水利与水电工程学院,北京102206

出　　处：《长江科学院院报》2024年第11期109-117,124,共10页Journal of Changjiang River Scientific Research Institute

基　　金：国家自然科学基金项目(52279065)。

摘　　要：在泄洪雾化过程中,挑流水舌与下游水垫塘的碰撞会产生大量水滴。随气流运动的水滴形成了雾流,进而对边坡稳定和交通安全产生影响。为了预测雾流在下游空间的分布,首先对挑流水舌、空气和下游水体之间的相互作用过程进行模拟,构建了雾流产生和输运的背景场。接着,基于雾滴产生机制,结合量纲分析方法,提出了雾流源强计算关系式,并建立了雾流源强和扩散数学模型。最后,应用该模型对漫湾水电站3#表孔泄洪的雾流过程进行了数值模拟。模拟结果与原型观测资料的对比显示:雾流源强的分布和雾源生成位置与原型观测相符,下游空间的雾流浓度分布与原型观测情况一致,观测点的雾流浓度计算值与原观值的变化趋势吻合。对比结果验证了该模型的适用性,为预测泄洪雾化在下游空间的雾流分布提供了一种新的方法。In the process of flood discharge atomization,a large number of water droplets will be generated by the collision between the jetted water tongue and the downstream water cushion pond.The droplets carried by the airflow form a fog flow,which affects slope stability and traffic safety.To predict the distribution of fog flow in the downstream space,the interaction process between the jetted water tongue,air,and downstream water was simulated,and a background field for fog flow generation and transport was constructed.Based on the fog source generation mechanism and dimensional analysis methods,a calculation formula for fog flow source strength is proposed,and a mathematical model for fog flow source strength and diffusion is established.The fog flow process of the 3#spillway hole discharge at the Manwan hydropower station is simulated using this model.The comparison shows that the distribution of fog flow source strength and the location of the fog source generation are consistent with prototype observation.The distribution of fog flow concentration distribution in the downstream space is in line with the prototype observation,and the calculated values of fog flow concentration at observation points match the trend of the original observed values.The comparison results verify the applicability of this model,providing a new method for predicting the distribution of fog flow in downstream spaces of flood discharge atomization.

关 键 词：泄洪雾化 雾流浓度 雾流源强 雾流扩散 漫湾水电站 

分 类 号：TV135.2[水利工程—水力学及河流动力学]