水利学报2018，Vol.49Issue(4)：404-418,15.DOI:10.13243/j.cnki.slxb.20170641
异重流潜入现象探讨Ⅰ:水槽实验与理论分析成果回顾
Investigation of density current plunging Ⅰ : Review of previous flume experiment works and theoretical analysis
范家骅 1祁伟 1戴清1
作者信息
- 1. 中国水利水电科学研究院,北京 100048
- 折叠
摘要
Abstract
This paper reviews previous flume experiment works and theoretical analysis of density current plunging,then explores the value of the densimetric Froude number Fp at the plunge point and the relationship of the value of Fp with the depth of the density current hd.The paper contains two parts.Here the first part presents a review of experiments of plunge point with turbid,saline or cold water inflow.Experimental value of Fp=0.5～0.8 in reservoir backwater region,and Fp=0.1～0.3 in navigation guiding channels were obtained by many researchers.Then a summary was made for the previous theoretical analysis and the numerical analysis of turbulent flow models for plunge point prediction.Various authors investigated the parameter Fp.which varies with the mixing coefficient,friction coefficient and the ratio of the density current depth hd downstream of the plunge point to the plunge point depth hp.Several schematic diagrams were developed,and analyses were made applying energy equation and momentum equation,and obtained some different types of Fp expressions.Some investigators used the method of turbulent models with numerical calculation to determine the value of hp or Fp.Comparison was made with the experiment values of hp or Fp.The previous theoretical analysis results of density current plunge point were used to compare with the writer's investigation results by theoretical analysis.关键词
异重流/异重流潜入/水槽实验/理论分析Key words
density current/density current plunging/flume experiment/theoretical analysis分类
建筑与水利引用本文复制引用
范家骅,祁伟,戴清..异重流潜入现象探讨Ⅰ:水槽实验与理论分析成果回顾[J].水利学报,2018,49(4):404-418,15.
