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Experimental analysis of hydraulic jump at high froude numbers

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Abstract

The hydraulic jump is a rapid transition state from supercritical to subcritical flow that occurs commonly in rivers, prismatic channels, and downstream of spillways. In this study, the characteristics of the hydraulic jump in a stilling basin downstream of the spillway chute channel with the slopes of α  =  12° and 30° were investigated experimentally for different Froude numbers of incoming flow, Fr1 = 7, 7.5, 8, 9, 10, and 12, and relative heights of sill in the range of 4 < hs/h1 (S) < 13 (hs, the sill height, h1 the flow depth at toe of the jump, S relative height). The velocity field was measured by laser Doppler Anemometry in the experiments, it was particularly focused on the effects of both different structural configurations and flow conditions on the hydraulic jump and energy dissipation ratio. Experimental measurements showed that the length of the hydraulic jump and the roller zone increases with the decrease of the sill height for α = 12° and 30°. In addition, the length of the hydraulic jump and roller zone increased with decreasing Froude numbers. The turbulence intensity in the jump region was determined to be greater than the turbulence intensity in the region near the bottom of the stilling basin. The turbulence intensity, in general, tended to decrease with decreasing Froude number.

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Data availability

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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Authors and Affiliations

  1. Department of Civil Engineering, Harran University, Sanliurfa, Turkey

    Oguz Simsek

  2. Department of Civil Engineering, Cukurova University, Adana, Turkey

    M. Sami Akoz

  3. Department of Civil Engineering, Mersin University, Mersin, Turkey

    N Goksu Soydan Oksal

Authors
  1. Oguz Simsek
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  2. M. Sami Akoz
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  3. N Goksu Soydan Oksal
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Correspondence to M. Sami Akoz.

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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Simsek, O., Akoz, M.S. & Oksal, N.G.S. Experimental analysis of hydraulic jump at high froude numbers. Sādhanā 48, 47 (2023). https://doi.org/10.1007/s12046-023-02081-8

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  • DOI: https://doi.org/10.1007/s12046-023-02081-8

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