Effect of 3D submerged jet shape on maximum pressure of plunge pool bottom

Maximum pressure is one of the key factors that affect jet scouring. Previous studies have focused on the attenuation characteristics of the submerged jet, but there are few studies on the influence of the nappe shape on the pressure of the plunge pool. In this paper, a combination of numerical simu...

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Bibliographic Details
Published in:AIP advances 2023-07, Vol.13 (7), p.075204-075204-8
Main Authors: Xia, Pengfei, Hao, Hongke, Feng, Hongliang, Song, Kai, Liu, Wen
Format: Article
Language:English
Subjects:
Aspect ratio
Diameters
Flow velocity
Mathematical analysis
Submerged jets
Triangles
Water depth
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Summary:Maximum pressure is one of the key factors that affect jet scouring. Previous studies have focused on the attenuation characteristics of the submerged jet, but there are few studies on the influence of the nappe shape on the pressure of the plunge pool. In this paper, a combination of numerical simulation and physical experiments was used to determine the influence on the maximum pressure of the vertical rectangular submerged jet with different aspect ratios (1, 3, 5, 8, 11.25, 15, and 20), incident flow velocity, and water depth on the plunge pool bottom. The hydraulic diameter, D, of the entering interface was proposed to measure the degree of dispersion of the nappe, based on which an empirical formula for the maximum pressure on the plunge pool bottom was obtained. By applying the formula to other shapes of jets (rhombuses, triangles, circles, ellipses, etc.), higher precision calculation results were also obtained, and the formula calculation results were in good agreement with the test results of the existing literature.
ISSN:2158-3226
2158-3226
DOI:10.1063/5.0155955