Numerical and Physical Modeling to Improve Discharge Rates in Open Channel Infrastructures

Water

Katharina Tondera¹  Mark Porter²  Carolyn Jacobs²  Neil Tindale²  Rick Jaeger² 

[1] IMT Atlantique Bretagne—Pays de Loire, Department of Energy Systems and Environment, 44307 Nantes, France;School of Science and Engineering, University of the Sunshine Coast, Sippy Downs, QLD 4556, Australia;

关键词: culvert;    culvert design;    culvert hydraulics;    culvert retrofitting;    discharge capacity;    inlet optimization;    ANSYS Fluent;   

DOI  :  10.3390/w11071414

来源: DOAJ

【 摘 要 】

This paper presents the findings of a study into how different inlet designs for stormwater culverts increase the discharge rate. The objective of the study was to develop improved inlet designs that could be retro-fitted to existing stormwater culvert structures in order to increase discharge capacity and allow for changing rainfall patterns and severe weather events that are expected as a consequence of climate change. Three different chamfer angles and a rounded corner were simulated with the software ANSYS Fluent, each of the shapes tested in five different sizes. Rounded and 45 ${}^{\circ }$ chamfers at the inlet edge performed best, significantly increasing the flow rate, though the size of the configurations was a critical factor. Inlet angles of 30 ${}^{\circ }$ and 60 ${}^{\circ }$ caused greater turbulence in the simulations than did 45 ${}^{\circ }$ and the rounded corner. The best performing shape of the inlet, the rounded corner, was tested in an experimental flume. The flume flow experiment showed that the optimal inlet configuration, a rounded inlet (radius = 1/5 culvert width) improved the flow rate by up to 20% under submerged inlet control conditions.

【 授权许可】

Unknown