Image processing and experimental techniques to characterize the hydraulic performance of grate inlets
This Doctoral Thesis dissertation concerns two main research topic: the analysis of the flow velocity pattern in the nearness of a grate inlet through Surface Flow Image Velocimetry (SFIV) technique and the study of overflow of surcharged sewer system through grate inlets. Concerning the first main...
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| Tipo de recurso: | tesis doctoral |
| Estado: | Versión publicada |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | CBUC, CESCA |
| Repositorio: | TDR. Tesis Doctorales en Red |
| OAI Identifier: | oai:www.tdx.cat:10803/666957 |
| Acceso en línea: | http://hdl.handle.net/10803/666957 https://dx.doi.org/10.5821/dissertation-2117-134614 |
| Access Level: | acceso abierto |
| Palabra clave: | Àrees temàtiques de la UPC::Enginyeria civil 004 626/627 |
| Sumario: | This Doctoral Thesis dissertation concerns two main research topic: the analysis of the flow velocity pattern in the nearness of a grate inlet through Surface Flow Image Velocimetry (SFIV) technique and the study of overflow of surcharged sewer system through grate inlets. Concerning the first main issue, a methodology able to reproduce the velocity field and, consequently, the flow distribution around the grate inlet, has been proposed. This methodology can be used by inlet manufacturers to improve the design of their products in order to collect as much water as possible in case of storms. In fact, water is collected by two main mechanisms: the frontal flow where the amount of water is intercepted through the upper part of the inlet (orthogonal to the flow direction), and the lateral flow where the flow is intercepted through the lateral side of the inlet (parallel to the main flow direction). As demonstrated and discussed in this thesis, this lateral inflow, due to the transversal component of the flow, is around a 20 - 30% respect to the 70 - 80% of the frontal flow. The second main issue treated in this thesis has been the behavior of the overflow by grate inlet due to pressured sewer systems. The estimation of grate inlet discharge coefficients and the head energy loss in this kind of situation could be very important to provide useful values to be used by commercial numerical code that nowadays use common default values assuming orifice or weir approaches. The experimental campaigns related to the two main topics were carried out using a physical model in real scale located in the Hydraulic Laboratory of the Technical University of Catalonia. It is important to consider that the SFIV technique method could be also extrapolated to other applications in the fields of hydraulic engineering like rivers and costal engineering. |
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