Considerations for the design of bottom intake systems

被引:9
作者
Carrillo, Jose M. [1 ]
Castillo, Luis G. [1 ]
Garcia, Juan T. [1 ]
Sordo-Ward, Alvaro [2 ]
机构
[1] Univ Politecn Cartagena, UPCT, Civil Engn Dept, Paseo Alfonso 13,52, Cartagena 30203, Spain
[2] Univ Politecn Madrid, Civil Engn Dept, Campus Moncloa, E-28040 Madrid, Spain
关键词
ANSYS CFX; bottom intake system; bottom rack; discharge coefficient; street gully; turbulence models; FLOW;
D O I
10.2166/hydro.2017.008
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
Knowing the scarcity of water in the southeast of Spain and how the rain occurs, we considered the design of intake systems in ephemeral riverbeds in order to try to capture part of the runoff flow. The intake systems generally consist of a rack located in the bottom of a river channel, so that the water collected passes down the rack and leads to the side channel. This behaviour has been studied in the laboratory by several researchers. However, due to the many effects that occur on the bars, it is not possible to analyse the whole problem of characterization with traditional methodologies. For instance, the wetted rack length necessary to collect a required flow presents important differences depending on what each author has considered relevant. Computational fluid dynamics simulations have been done to improve the knowledge of the hydraulic phenomenon observed in different laboratory experiences, for which we have previously calibrated the numerical models using laboratory results. The ANSYS CFX code was selected. Several two-equation turbulence models have been considered. The results show differences smaller than 1% in the wetted rack length, and discharge coefficients also present good agreement.
引用
收藏
页码:232 / 245
页数:14
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