水利水电科技进展2017，Vol.37Issue(1)：27-32,6.DOI:10.3880/j.issn.1006-7647.2017.01.005
浮帘群水流阻力特性试验研究
Experimental study on flow resistance of suspended flexible curtain group
摘要
Abstract
To explore resistance characteristics and calculation methods of resistance parameters in uniform steady open channel flow with a suspended flexible curtain group ( SFCG) , 92 sets of flume experiments were carried out with different curtain spacing, curtain heights, and flow conditions. The hydraulic gradients along the flume were obtained through curve fittings of water surfaces, and the drag coefficient Manning roughness and Darcy-Weisbach friction factor were studied. It is shown that the mutual interference among the SFCG would almost disappear under the critical curtain spacing. The SFCG significantly exhausts flow energy and increases resistance, and the drag coefficient hardly changes in different turbulent flow conditions with the range from 1. 60 to 2. 05. The Manning roughness is mainly related to the relative height and arrangement density of SFCG, and a modified calculation method for Manning roughness is proposed. In addition, the Darcy-Weisbach friction factor can be obtained from a fitting formula depending on relative height, distribution density of SFCG, and Reynolds number.关键词
浮帘群/阻力特性/拖曳力系数/曼宁糙率/达西韦斯巴赫阻力系数Key words
suspended flexible curtain group/resistance characteristics/drag coefficient/Manning roughness/Darcy-Weisbach friction factor分类
建筑与水利引用本文复制引用
冯缤予,喻国良..浮帘群水流阻力特性试验研究[J].水利水电科技进展,2017,37(1):27-32,6.基金项目
国家自然科学基金(51179101) （51179101）
