【摘要】：為探明含浮簾群水流的阻力特性和各阻力參數(shù)計算方法,對不同間距、不同高度浮簾群在不同恒定均勻明渠流中的阻力特性開展了92組水槽試驗。通過擬合水面線獲得水力坡降,探討浮簾拖曳力系數(shù)、曼寧糙率和達西韋斯巴赫阻力系數(shù)的變化規(guī)律。研究結(jié)果表明:浮簾群布置存在臨界間距,此時浮簾間的相互干擾作用幾乎消失;浮簾群消能增阻作用明顯,其拖曳力系數(shù)在不同水流條件下變化較小,取值介于1.60~2.05之間;曼寧糙率主要與浮簾相對高度及浮簾分布密度有關(guān),并獲得了曼寧糙率的修正計算方法;達西韋斯巴赫阻力系數(shù)可由浮簾相對高度、浮簾分布密度及浮簾雷諾數(shù)組成的擬合公式獲得。
[Abstract]:In order to find out the resistance characteristics of flow with floating curtain group and the calculation method of resistance parameters 92 groups of flume tests were carried out on the resistance characteristics of floating curtain group with different spacing and height in different constant and uniform open channel flow. The hydraulic gradient was obtained by fitting the surface line, and the variation law of drag coefficient of floating curtain, Manning roughness and drag coefficient of Darcy Weisbach were discussed. The results show that the critical spacing exists in the arrangement of floating curtains, and the interaction between floating curtains almost disappears, and the energy dissipation and drag increase of floating curtains are obvious, and the drag force coefficient of floating curtains varies slightly under different water flow conditions, and the value is between 1.60 and 2.05. Manning roughness is mainly related to the relative height of floating curtain and the distribution density of floating curtain, and the modified calculation method of Manning roughness is obtained, and the drag coefficient of Darcy Weisbach can be calculated from the relative height of floating curtain. The fitting formula of the distribution density and Reynolds number of floating curtain is obtained.
【作者單位】： 上海交通大學船舶海洋與建筑工程學院;
【基金】：國家自然科學基金(51179101)
【分類號】：TV147

【相似文獻】

相關(guān)期刊論文 前4條

1 朱克強,曹奇英,施國慶;分段曳力系數(shù)在纜體系統(tǒng)仿真中的應用[J];鎮(zhèn)江船舶學院學報;1993年01期

2 黃衛(wèi)星;諸海碧;黎梅;李海龍;祝京旭;;氣固循環(huán)床上行兩相流顆粒曳力系數(shù)研究[J];四川大學學報(工程科學版);2008年02期

3 王W，

本文編號：2235608