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http://dx.doi.org/10.17820/eri.2019.6.3.137

Measurements of Void Fraction of Aerated Flows over Hydraulic Structures  

Ryu, Yong-Uk (Department of Ocean Engineering, Pukyong National University)
Lee, Nam-Joo (School of Civil, Urban, and Environmental Engineering, Kyungsung University)
Publication Information
Ecology and Resilient Infrastructure / v.6, no.3, 2019 , pp. 137-144 More about this Journal
Abstract
This study carried out experimental investigation through measurements of void fraction of aerated flows generated near hydraulic structures. The imaging technique applying the shadowgraphy method was employed to quantify aeration by measuring void fractions. Aerated flows in the vicinity of a sloped weir and a stepped weir were measured using the imaging technique. Spatially distributed void fraction that was possible from gray images gives aeration rate of the flows over hydraulic structures with eco-environmental function. Aeration over the stepped weir takes place more strongly and widely in its front slope and downstream compared to the sloped weir.
Keywords
Aeration; Image technique; Sloped weir; Stepped weir; Void fraction;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Ryu, Y. and Jung, T. 2015. Application of image technique and optical fiber sensor for air-water mixture flow. Journal of Korean Water Resources Association 48(7): 535-543. (in Korean)   DOI
2 Chanson, H. 2001. Teaching hydraulic design in an Australian undergraduate civil engineering curriculum. Journal of Hydraulic Engineering 127(12): 1002-1008.   DOI
3 Chang, K.A., Lim, H.J., and Su, C.B. 2002. A fibre optic fresnel ratio meter for measurements of solute concentration and refractive index change in fluids. Measurement Science and Technology 13: 1962-1965.   DOI
4 Ryu, Y, Chang, K.A., and Lim, H.J. 2005. Use of bubble image velocimetry for measurement of plunging wave impinging on structure and associated greenwater. Measurement Science and Technology 16: 1945-1953.   DOI