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不同动态水压模式下迷宫流道内颗粒物运动特性研究
Authors
吴普特
张 林
+3 more
朱德兰
赵 笑
郑 超
Publication date
1 January 2017
Publisher
Abstract
采用 PTV 技术,观测三角函数、三角、台阶、矩形波形动态水压模式下迷宫流道内颗粒物的运动情况,分析不 同动态水压模式下迷宫流道内单个颗粒物运动轨迹、运动速度及流体流场,揭示动态水压抗堵塞机理。结果表明: 相对于三角、台阶及矩形波形动态水压模式,三角函数波形动态水压模式下颗粒物滞留滞止区内的时间最短,颗粒 物的沉积概率最小,水流对颗粒物的输移能力最大;三角函数波形动态水压模式下流道内产生的水流波动效应不 断冲击流道滞止区内存在的低速漩涡,加剧了滞止区水流紊动,进入滞止区的颗粒物随水流不断运动,并对滞留甚 至沉积在滞止区内的颗粒物发生强烈冲击,使得颗粒物离底悬浮,返回主流区,并迅速通过流道,增大了水流对颗 粒物的输移能力,增强了流道的抗堵塞性能。</p
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Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources
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oai:ir.iswc.ac.cn/:361005/8360
Last time updated on 26/02/2019