明渠湍流结构对粒子运动跟随性影响综述
Review on influence of turbulent structure on particle moving followability in open channels
张先炳 1丁小峰 1杨威 1杨胜发1
作者信息
- 1. 重庆交通大学国家内河航道整治工程技术研究中心,重庆 400074
- 折叠
摘要
近年来大量学者通过室内试验、现场观测以及数值模拟等方法对明渠湍流中粒子的运动规律进行了深入细致的研究,逐步揭示了明渠湍流中粒子运动复杂性的本质和规律,并将成果应用于河流泥沙输移、河流地貌演变以及生态环境保护等多个领域.鉴于明渠湍流具有明显的分区效应,其湍流流速分布、分区结构组成以及相干结构分布特性等对水中粒子的运动过程均会产生显著影响,对水中粒子在明渠湍流结构中的整体运动规律、湍流结构内区以及外区的运动过程进行了总结;重点阐述了近壁区粒子运动规律的反常现象和原因,以及湍流结构中粒径、密度和Stokes数这3 个影响粒子运动过程的主要因素.研究成果可为泥沙运动以及生态保护等研究及应用提供参考.
Abstract
In recent years,a large number of scholars have conducted in-depth and detailed researches on the motion law of particles in open channel turbulence through laboratory experiments,field observations and numerical simulation,and have gradu-ally revealed the essence and law of the particle motion complexity in open channel turbulence.The results have been applied to many fields such as river sediment transport,river geomorphic evolution and ecological environment protection.In view of the obvi-ous partition effect of open channel turbulence,its turbulent flow velocity distribution,partition structure composition and coherent structure distribution characteristics will have a significant impact on the motion process of particles in water.Therefore,this paper summarized the overall motion law of particles turbulence structure in in open channels,and the motion process of particles in the inner and outer regions of turbulence structure.The abnormal phenomena and causes of particle motion in the near-wall region,as well as the three main factors affecting the particle motion process,such as particle size,density and Stokes number,were em-phatically expounded in order to provide reference for the research and application of sediment movement and ecological protec-tion.
关键词
明渠湍流/固液两相流/粒子跟随性/湍流分区结构Key words
open channel turbulence/solid liquid two phase flow/moving followability of particles/turbulence partition structure引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据