长江科学院院报2017，Vol.34Issue(1)：67-70,4.DOI:10.11988/ckyyb.20150827
基于降雨分析的窄缝挑坎消能工水翅特性研究
Research on the Characteristics of Water Wing of Slit-type Energy Dissipator Based on Rainfall Analysis
摘要
Abstract
A physical model of slit-type energy dissipator was built to study the water wing through adjusting the shape parameters ( Froude number Fr, contraction ratioβ, and pick angleθ) to obtain different jet flow conditions. The changes of precipitation intensity and the causes of water wing were analyzed through comparison, and the hy-draulic factors which affect the water wing formation and its intensity variation were summarized. Results indicate that the peripheral jet trajectory length and dived length of water tongue increased with the increasing of Fr,and the rainfall distribution in typical areas downstream the bucket changed in correspondence. Moreover, with the increase of contraction angle, shock wave angle became small;the diffusion angle of the water wing to shore was also smal-ler;the intersection of shock waves became closer to the outlet of narrow slit;and correspondingly the range of rain-fall diffusion also decreased. In addition, the contraction ratio was inversely proportional to the peripheral jet trajec-tory length and dived length of water tongue. The research couldenrich the understanding of hydraulic characteris-tics, in particular, the water wing formation mechanism of the slit-type energy dissipation and provide basis for the optimization of projects.关键词
窄缝挑坎/消能工/水翅/降雨强度/水力特性Key words
slit-type flip bucket/energy dissipator/water wing/rainfall intensity/hydraulic characteristics分类
建筑与水利引用本文复制引用
聂艳华,王才欢,况曼曼..基于降雨分析的窄缝挑坎消能工水翅特性研究[J].长江科学院院报,2017,34(1):67-70,4.基金项目
国家自然科学基金项目(51279013,51379020,51509015) （51279013,51379020,51509015）
长江科学院中央级公益性科研院所基本科研项目(CKSF2014042/SL, CKSF2014044/SL) （CKSF2014042/SL, CKSF2014044/SL）
