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Article

Pressure Fluctuations in the Spatial Hydraulic Jump in Stilling Basins with Different Expansion Ratio

1
Department of Water Engineering, University of Tabriz, Tabriz 51368, Iran
2
Department of Hydraulic Engineering and Environment, Universitat Politècnica de València, Camí de Vera, s/n, 46022 Valencia, Spain
3
Department of Civil, Architectural and Environmental Engineering, University of Napoli Federico II, 80125 Napoli, Italy
*
Author to whom correspondence should be addressed.
Water 2021, 13(1), 60; https://doi.org/10.3390/w13010060
Received: 16 September 2020 / Revised: 16 December 2020 / Accepted: 17 December 2020 / Published: 30 December 2020
(This article belongs to the Special Issue Physical Modelling in Hydraulics Engineering)
Pressure fluctuations are a key issue in hydraulic engineering. However, despite the large number of studies on the topic, their role in spatial hydraulic jumps is not yet fully understood. The results herein shed light on the formation of eddies and the derived pressure fluctuations in stilling basins with different expansion ratios. Laboratory tests are conducted in a horizontal rectangular flume with 0.5 m width and 10 m length. The range of approaching Froude numbers spans from 6.4 to 12.5 and the channel expansion ratios are 0.4, 0.6, 0.8, and 1. The effects of approaching flow conditions and expansion ratios are thoroughly analyzed, focusing on the dimensionless standard deviation of pressure fluctuations and extreme pressure fluctuations. The results reveal that these variables show a clear dependence on the Froude number and the distance to the hydraulic jump toe. The maximum values of extreme pressure fluctuations occur in the range 0.609<X<3.385, where X is dimensionless distance from the toe of the hydraulic jump, which makes it highly advisable to reinforce the bed of stilling basins within this range. View Full-Text
Keywords: extreme pressure; gradually expanding channel; spatial hydraulic jump; stilling basins; turbulence flow extreme pressure; gradually expanding channel; spatial hydraulic jump; stilling basins; turbulence flow
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MDPI and ACS Style

Hassanpour, N.; Hosseinzadeh Dalir, A.; Bayon, A.; Abdollahpour, M. Pressure Fluctuations in the Spatial Hydraulic Jump in Stilling Basins with Different Expansion Ratio. Water 2021, 13, 60. https://doi.org/10.3390/w13010060

AMA Style

Hassanpour N, Hosseinzadeh Dalir A, Bayon A, Abdollahpour M. Pressure Fluctuations in the Spatial Hydraulic Jump in Stilling Basins with Different Expansion Ratio. Water. 2021; 13(1):60. https://doi.org/10.3390/w13010060

Chicago/Turabian Style

Hassanpour, Nasrin; Hosseinzadeh Dalir, Ali; Bayon, Arnau; Abdollahpour, Milad. 2021. "Pressure Fluctuations in the Spatial Hydraulic Jump in Stilling Basins with Different Expansion Ratio" Water 13, no. 1: 60. https://doi.org/10.3390/w13010060

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