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CFD Modelling of a Stepped Spillway with Various Step Layouts
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Concrete Structures.
Chongqing Jiaotong Univ, Southwest Sci Res Inst Water Transport Engn, Chongqing 400016, Peoples R China..
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Resources, Energy and Infrastructure.ORCID iD: 0000-0002-4242-3824
2019 (English)In: Mathematical problems in engineering (Print), ISSN 1024-123X, E-ISSN 1563-5147, Vol. 2019, article id 6215739Article in journal (Refereed) Published
Abstract [en]

A traditional stepped spillway is prone to cavitation risks. To improve its hydraulic behaviors, distorted step faces and pool weirs are devised. By numerical modelling, comparative studies are conducted to look into the flow features. The pressures on step surfaces of the unconventional layouts exhibit 3D distributions. Pool weirs are essential in increasing both the min. and max. pressure loads. Pressures on the downstream bed show a unique pattern for V- and inverted V-shaped models, with the extreme pressures at the sidewalls for the former and at the central plane for the latter. Symmetrical secondary flows are formed in V- and inverted V-shaped cases with different patterns. Distributions of turbulent kinetic energy suggest differences in flow motions in all cases. Furthermore, the relative energy loss of flat setups is similar to 5.4% lower than that of the pooled ones with the same step face angle; inverting the face angle does not give rise to noticeable change. The results provide reference for relevant projects.

Place, publisher, year, edition, pages
Hindawi Publishing Corporation, 2019. Vol. 2019, article id 6215739
National Category
Civil Engineering
Identifiers
URN: urn:nbn:se:kth:diva-266178DOI: 10.1155/2019/6215739ISI: 000502054400004Scopus ID: 2-s2.0-85076517144OAI: oai:DiVA.org:kth-266178DiVA, id: diva2:1384136
Note

QC 20200109

Available from: 2020-01-09 Created: 2020-01-09 Last updated: 2020-01-09Bibliographically approved

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Li, ShichengYang, James

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