Author(s): C. I. Robertson; R. H. J. Sellin

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Abstract: As part of the pre-feasibility study for the Severn Barrage, hydraulic tests were carried out on half models of three sluice passageway designs based on a vertical gated Venturi passage. Froude law scaling relationships were used throughout and the models were tested over a range of water levels corresponding to the expected sea level variation at the preferred barrage site. The sluices were tested under simulated in-service conditions, the flow being in one direction only, i.e. from the open sea. The quantitative results are presented as diffuser efficiency values. Flow visualisation identified regions of flow separation and measurements were also made of the downstream velocity distribution in a vertical plane. The three models tested here represent progressive modification and improvement to the original design and their performance, as represented by diffuser efficiency, was improved from 0.55 to 0.75 and finally to 0.85.

DOI: https://doi.org/10.1080/00221688509499338

Year: 1985