Hydraulic Jump and Energy Dissipation with Sluice Gate

Water

Youngkyu Kim²  Gyewoon Choi³  Hyoseon Park³  Seongjoon Byeon¹ 

[1] International Center for Urban Water Hydroinformatics Research & Innovation, 169, Gaetbeol-ro, Yeonsu-gu, Incheon 21999, Korea;DOHWA Engineering Co. Ltd., 438, Samseong-ro, Gangnam-gu, Seoul 06178, Korea; E-Mail:;Department of Civil and Environmental Engineering, Incheon National University, 119, Academy-ro, Yeonsu-gu, Incheon 22012, Korea; E-Mails:

关键词: weir;    sluice gate;    energy dissipator;    hydraulic jump;   

DOI  :  10.3390/w7095115

来源: mdpi

【 摘 要 】

Movable weirs have been developed to address the weaknesses of conventional fixed weirs. However, the structures for riverbed protection downstream of movable weirs are designed using the criteria of fixed weirs in most cases, and these applications cause problems, such as scour and deformation of structures, due to misunderstanding the difference between different types of structures. In this study, a hydraulic experiment was conducted to examine weir type-specific hydraulic phenomena, compare hydraulic jumps and downstream flow characteristics according to different weir types, and analyze hydraulic characteristics, such as changes in water levels, velocities and energy. Additionally, to control the flow generated by a sluice gate, energy dissipators were examined herein for their effectiveness in relation to different installation locations and heights. As a result, it was found that although sluice gates generated hydraulic jumps similar to those of fixed weirs, their downstream supercritical flow increased to eventually elongate the overall hydraulic jumps. In energy dissipator installation, installation heights were found to be sensitive to energy dissipation. The most effective energy dissipator height was 10% of the downstream free surface water depth in this experiment. Based on these findings, it seems desirable to use energy dissipators to reduce energy, as such dissipators were found to be effective in reducing hydraulic jumps and protecting the riverbed under sluice gates.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.