An Experimental Investigation on Aeration Performance of Sharp-crested Weirs: Discharge Effect

Authors : Serhat Küçükali

Pages : 736-741

Doi:10.35229/jaes.1402216

View : 21 | Download : 30

Publication Date : 2023-12-31

Article Type : Research Paper

Abstract :In this experimental study, the aeration performance of weirs was investigated by means of the discharge effect. For this purpose, experiments were performed at a 90º V-notch weir with drop heights ranging from 0.35-0.535 m and unit discharges ranging from 3x10-2 to 6.33x10-2 m2/s and E20 varied in the range of 0.13-0.23. A positive correlation was found between the unit discharge and aeration efficiency and the resulting relationship was defined by a power function in terms of drop height and unit discharge. It was found that aeration efficiency is in proportion to the 3/4 power of drop height and 1/3 power of unit discharge. The proposed empirical formula prediction capacity has been compared with the other empirical formulas in terms of their average relative error values. Additionally, by assuming a drop height equal to head loss, it was observed that hydraulic jump aeration efficiency dependence on head loss continued for weirs indicating the free-surface macro turbulence\'s main role in the process.
Keywords : İnce kenarlı savak, doğal havalandırma, çözünmüş oksijen, düşüm yüksekliği, debi etkisi