Subcritical 90° Equal-Width Open-Channel Dividing Flow

doi:10.1061/(ASCE)0733-9429(2002)128:7(716)

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题名:	Subcritical 90° Equal-Width Open-Channel Dividing Flow
作者:	Hsu, C.C.;Tang, C.J.;Lee, W.J.;Shieh, M.Y.
关键词:	Open channel flow;Water discharge;Contraction;Froude number
日期:	2002-07
上传时间:	2019-05-22 12:44:20 (UTC+8)
摘要:	Based on experimental observations, for a subcritical, right-angled, equal-width, open-channel dividing flow over a horizontal bed, the contraction coefficient at the maximum width-contracted section in the recirculation region is almost inversely related to the main channel upstream-to-downstream discharge ratio. The energy heads upstream and downstream of the division in the main channel are found to be almost equal. Under the assumption that the velocities are nearly uniformly distributed at the considered boundaries, the depth-discharge relationship follows the commonly used energy equation. The predicted results correlate fairly with the experimental data from this and other studies. The energy-loss coefficient of a division is expressed in terms of discharge ratio, upstream Froude number, and depth ratio. An expression for practical engineering applications is to determine the maximum possible branch-channel discharge at a given upstream discharge with a prescribed downstream Froude number or the maximum possible downstream Froude number if both branch- and main-channel discharges are prescribed.
關聯:	Journal of Hydraulic Engineering 128(7), p.716-720
DOI:	10.1061/(ASCE)0733-9429(2002)128:7(716)
显示于类别:	[水資源及環境工程學系暨研究所] 期刊論文

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