Numerical Study of the Effect of Gradual Parabolic Inlet Transition of the Elliptical LOPAC Gate on the Hydraulic Conditions of the Flow

Document Type : Research Paper

Authors

1 ‌Professor, Department of Water Structures, Faculty of Water and Environmental Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran.

2 ‌Master of Water Structures, Faculty of Water and Environmental Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran.

3 Assistant Professor, Department of Water Structures, Faculty of Water and Environmental Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran.

Abstract

Flow control and regulation of water levels in irrigation canals are critical to improving the distribution network's performance, water transfer, and ease of operation of the intakes. Therefore, the network needs to improve the existing control and regulation structures and construct the new structures (Monem and Hosseinzadeh, 2012). Today, various spillways and gates have been used as control and regulation structures in water transmission networks. Elliptical LOPAC gates are a particular type of gate that researchers have considered in recent decades due to their convenient advantages (Pilbala et al., 2021). Studies have been limited so far, so in this study, the hydraulic performance of this type of gate with the presence of gradual inlet transition has been investigated both experimentally and numerically. Research on Lopac gates indicates that studies have been performed on hydraulics, mainly in a sudden contraction or full-width gates in the laboratory flume. However, in many cases, the width of the gate needs to be less than the width of the channel, and an inlet transition is necessary to reduce the energy loss. Therefore, a parabolic transition was used in this study, and in particular, the effect of the parabolic transition upstream of the elliptical Lopac gate on the hydraulic conditions was investigated using Flow-3D software.

Keywords

Main Subjects

References

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Irrigation Sciences and Engineering
Volume 47, Issue 3
October 2024
Pages 1-17

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History

  • Receive Date: 30 September 2021
  • Revise Date: 06 May 2022
  • Accept Date: 08 May 2022
  • Publish Date: 22 October 2024

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