Laboratory investigation of hydraulic efficiency of transverse grates in roads

Özbey, Cumhur
In this study, hydraulic efficiency of transverse grated inlet systems to be used in small roads is experimentally investigated. For this purpose, an existing experimental setup in the Hydromechanics Laboratory of METU is utilized. Three sets of experiments are conducted in order to examine the relationship between the total flow rate and the grate efficiency with respect to several parameters. In the first set, the interdependence of the void ratio and grate efficiency is investigated. In the second set of the experiments, the influence of the configuration on the hydraulic efficiency is studied. The final set of the experiments is performed to observe the grate efficiency of two successive grates. The result of each experiment is presented in detail.


Design and analysis of a vertical axis water turbine for river applications using computational fluid dynamics
Demircan, Eren; Aksel, Mehmet Haluk; Pınarcıoğlu, Mehmet Melih; Department of Mechanical Engineering (2014)
The main purpose of this study is to design a Darrieus rotor type vertical axis water turbine using Computational Fluid Dynamics (CFD) in order to be used in river currents. The CFD modeling is based on two dimensional numerical solution of the rotor motion using commercial Unsteady Reynolds Averaged Navier-Stokes solvers, Ansys Fluent and CFX. To validate the two dimensional numerical solution, an experimental Darrieus rotor type water turbine from literature is studied and performance of several turbulenc...
Numerical modelling of continuous transverse grates for hydraulic efficiency /
Sezenöz, Berk; Tiğrek, Şahnaz; Department of Civil Engineering (2014)
In this study, numerical analyses of newly proposed grated inlet system for small roads are carried out. The model is based on a setup constructed in Hydromechanics Laboratory of METU. The physical model which is a rectangular channel of 0.9m width acts as a small road and continuous transverse grate system is installed as an inlet structure. The physical conditions were modeled by using Flow 3D software. The rates of the intercepted flows are measured and compared with the results of experimental data coll...
Computational modelling of free surface flow in intake structures using flow 3D software
Aybar, Akın; Aydın, İsmail; Department of Civil Engineering (2012)
Intakes are inlet structures where fluid is accelerated to a certain flow velocity to provide required amount of water into a hydraulic system. Intake size and geometry affects the formation of flow patterns, which can be influential for hydraulic performance of the whole system. An experimental study is conducted by measuring velocity field in the hydraulic model of the head pond of a hydropower plant to investigate vortex formation. Vortex strength based on potential flow theory is calculated from the mea...
Incompressible flow simulations using least squares spectral element method on adaptively refined triangular grids
Akdağ, Osman; Sert, Cüneyt; Department of Mechanical Engineering (2012)
The main purpose of this study is to develop a flow solver that employs triangular grids to solve two-dimensional, viscous, laminar, steady, incompressible flows. The flow solver is based on Least Squares Spectral Element Method (LSSEM). It has p-type adaptive mesh refinement/coarsening capability and supports p-type nonconforming element interfaces. To validate the developed flow solver several benchmark problems are studied and successful results are obtained. The performances of two different triangular ...
Experimental investigation of axial load on low cycle fatigue performance of steel H-piles in integral bridges
Dicleli, Murat (null; 2017-08-28)
In this study, the effect of axial load on the low cycle fatigue performance of integral bridge steel H–piles is investigated. Review of literature revealed that there is no experimental research data on the effect of axial load on the low cycle fatigue performance of integral bridge steel H-piles. For this purpose, experimental studies on full scale steel H-pile specimens are conducted to simulate cyclic behavior of steel Hpiles under thermal effects in integral bridges by considering the effect of axial l...
Citation Formats
C. Özbey, “Laboratory investigation of hydraulic efficiency of transverse grates in roads,” M.S. - Master of Science, Middle East Technical University, 2015.