Experiences from Modifications of Curved Spillway Channels in Dam Rebuilding Projects
To safely discharge higher design floods, a number of curved spillway channels need to be modified. The design flood of a dam is often released at higher reservoir level. thus giving rise to higher flow velocity in the channel. The combination of more water and higher velocity results in accentuated nonuniform channel flows. The unfavorably distributed flow into a stilling basin or plunge pool aggravates also the energy dissipation. The curved spillway channels of several existing dams are modified in physical model tests. The adopted countermeasures include heightened sidewalls, prolonged,spillway piers, new partition walls, streamlining discontinuities in the waterway, the use of differential bottom elevations in cross section, addition of deflector on sidewalls or a combination of several measures. The project experiences are summarized in this paper, with emphasis on flow patterns at high discharges and countermeasures.
James Yang Patrik Andreasson Malte Cederstrom
Vattenfall R&D, Alvkarleby & the Royal Institute of Technology (KTH), Stockholm Vattenfall R&D, Alvkarleby & Luted Technical University (LTU), Lulea, Sweden Vatten fall Nordic, Hydro Power, Stockholm
国际会议
南京
英文
245-252
2010-09-13（万方平台首次上网日期，不代表论文的发表时间）