The effect of sharp-crested weir shape on air entrainment

被引:23
作者
Baylar, A [1 ]
Emiroglu, ME [1 ]
机构
[1] Firat Univ, Dept Civil Engn, TR-23279 Elazig, Turkey
关键词
aeration; air entrainment rate; plunging overfall jet; sharp-crested weir;
D O I
10.1139/L02-017
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Aeration in the waters of rivers and streams is very important to the quality and existence of aquatic life. If the overfall jets downstream of weir structures plunges into a plunge pool, entrained air bubbles will contribute to aeration. This paper investigates sharp-crested weirs having different cross-sectional geometry and their effect on the air entrainment rate. It is demonstrated that the air entrainment rate of a 30degrees triangular sharp-crested weir is better than that of the other sharp-crested weirs tested. Moreover, variation in the number of V-notches over the width of the weir plate was studied for 30degrees triangular sharp-crested weirs. The 30degrees triangular sharp-crested weir with two V-notches was found to have higher values of air entrainment rate.
引用
收藏
页码:375 / 383
页数:9
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