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Relevant bibliographies by topics / Ogee spillway

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Academic literature on the topic 'Ogee spillway'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 June 2025

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Journal articles on the topic "Ogee spillway"

1

Roushangar, Kiyoumars, Ali Foroudi, and Mojtaba Saneie. "Influential parameters on submerged discharge capacity of converging ogee spillways based on experimental study and machine learning-based modeling." Journal of Hydroinformatics 21, no. 3 (2019): 474–92. http://dx.doi.org/10.2166/hydro.2019.120.

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Abstract Ogee spillways with converging training walls are applied to lower the hazard of accidental flooding in locations with limited construction operations due to their unique structure. Hence, this type of structure is proposed as an emergency spillway. The present study aimed at experimental and machine learning-based modeling of the submerged discharge capacity of the converging ogee spillway. Two experimental models of Germi-Chay dam spillway were utilized: one model having a curve axis which was made in 1:50 scale and the other with a straight axis in 1:75 scale. Using visual observation, it was found that the total upstream head, the submergence degree, the ogee-crest geometries and the convergence angle of training walls are the crucial factors which alter the submerged discharge capacity of the converging ogee spillway. Furthermore, two machine-learning techniques (e.g. artificial neural networks and gene expression programming) were applied for modeling the submerged discharge capacity applying experimental data. These models were compared with four well-known traditional relationships with respect to their basic theoretical concept. The obtained results indicated that the length ratio () had the most effective role in estimating the submerged discharge capacity.

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Daneshfaraz, Rasoul, and Amir Ghaderi. "Numerical Investigation of Inverse Curvature Ogee Spillway." Civil Engineering Journal 3, no. 11 (2017): 1146. http://dx.doi.org/10.28991/cej-030944.

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Design of water structures and their segments including spillways play an important role in water resources management and agricultural activities. In the the linear body part of an ogee spillway, for speeding up the flow rate, the flow should be transferred to the stilling basin by inverse curve so that the water energy can be reduced. This study aims to evaluate the effect of the inverse profile curvature on the pressure of spillway surface using Fluent software. For this purpose, five different curvatures of inverse profile were considered to be equal to no-curvature (zero), 1, 1.5, 2 and 2.5 of the spillway design head. The results indicated that by increasing the curvature radius, the maximum pressure dramatically reduced. And for this purpose, some relationships were given to predict the pressure reduction. Pressure increment in zero curvature is caused by sudden collision of flow lines and turbulence caused by it. By increase in inverse profile curvature, the turbulence is created in flow lines and the maximum pressure shows a lower value than before. In general, there was little change in the average absolute pressure.

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Kote, A. S., and P. B. Nangare. "Hydraulic Model Investigation on Stepped Spillway's Plain and Slotted Roller Bucket." Engineering, Technology & Applied Science Research 9, no. 4 (2019): 4419–22. http://dx.doi.org/10.48084/etasr.2837.

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In ogee spillway, the released flood water from crest to toe possesses a high amount of kinetic energy causing scour and erosion on the spillway structure. The dam projects normally have a stilling basin as an energy dissipater which has specific energy dissipation limitations. The stepped spillway is a better option to minimize kinetic energy along the chute and safely discharge water in the river domain. The Khadakwasla dam is situated in Pune, Maharashtra (India), and has scouring and erosion issues on the chute of ogee spillway and on the stilling basin. The present study develops a physical hydraulic model for the dam spillway with steps, plain and slotted roller bucket as per IS Code 6934 (1998) and IS Code 7365 (2010). Experiments were performed at heads of 4m (low head) and 6m (high head) on the developed physical models, namely on the plain and slotted roller bucket model for the ogee spillway and the plain and slotted roller bucket model for the stepped spillway. It was found that the plain roller bucket of ogee spillway dissipates 81.26% of energy at the low head, whereas the stepped spillway with slotted roller bucket dissipates the 83.86% of the energy at the high head.

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Daneshfaraz, Rasoul, Amir Ghaderi, Aliakbar Akhtari, and Silvia Di Francesco. "On the Effect of Block Roughness in Ogee Spillways with Flip Buckets." Fluids 5, no. 4 (2020): 182. http://dx.doi.org/10.3390/fluids5040182.

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In this study, the effect of the presence of bed-block roughness in an ogee spillway on energy dissipation and jet length is investigated. A series of experimental and numerical tests were conducted using an ogee spillway with block roughness on the bed without a flip bucket and with a flip bucket at different take-off angles (32 °C and 52 °C). To model the free-flow surface, the volume-of-fluid (VOF) method and turbulence model from RNG k–ε were used. Results indicated that the numerical model is fairly capable of simulating a free-flow surface over an ogee spillway; using block roughness on the spillway chute without a bucket, relative energy dissipation increased by 15.4% compared to that in the spillway with a smooth bed, while for the spillway with 32 °C and 52 °C buckets, it increased by 9.5%. The jet length for a spillway with a flip bucket and roughened bed decreased by 8% to 58% compared to that in a smooth bed. Lastly, the relationships for the estimation of relative energy dissipation and jet length are presented.

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I. Othman, Khalil. "Scour Downstream an Ogee Spillway." AL-Rafdain Engineering Journal (AREJ) 16, no. 3 (2008): 143–55. http://dx.doi.org/10.33899/rengj.2008.44680.

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Yildiz, Ali, Alspan Yarar, Ali Ihsan Marti, and Ozmur Kocaer. "A new approach to determine the discharge passing over ogee spillway." SIMI 2019, Abstract Book, SIMI 2019 (September 20, 2019): 17–23. http://dx.doi.org/10.21698/simi.2019.fp01.

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The main purpose of this study is investigation of flow over an ogee spillway experimentally and comparison with the analytical results. An experimental study was conducted to obtain discharges and heads over an ogee spillway. 30 different discharge and flow depths of flow in physical model were measured. Nondimensional discharge and flow depth curves are used to compare the results. Experimental results indicate that some regulations can be done in analytical formulas. In this way the analytical results can be get more accurately.

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Hong, Seung Ho, Terry W. Sturm, and Juan A. González-Castro. "Transitional Flow at Low-Head Ogee Spillway." Journal of Hydraulic Engineering 144, no. 2 (2018): 04017062. http://dx.doi.org/10.1061/(asce)hy.1943-7900.0001398.

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Chen, Li Qiang, Jun Xing Wang, and Yu Ting Chen. "Numerical Simulation on Backwater Downstream of Aerators in Spillway Tunnel with Ultra-Low Frounde Number Flow." Applied Mechanics and Materials 444-445 (October 2013): 539–43. http://dx.doi.org/10.4028/www.scientific.net/amm.444-445.539.

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The backtracking of flow occurs easily in cavity of aeration step in spillway tunnel with a gentle bottom slope and ultra-low Frounde number, and this influences the intake of air, so combined with the spillway tunnel of Chang heba Hydropower Station, four bodily form of aeration steps are chosen to be studied by both numerical simulation and model test based on κ-ε turbulence model, they are continuous aeration step, U-type aeration step + local steep slope, continuous aeration step + circular arc type steep slope and continuous aeration step + ogee curve steep slope, the results show that, the downstream bottom slope of aeration step with suitable ogee curve or circular arcs can efficiently inhibit the backtracking of flow in continuous aeration step, and can efficiently eliminate hydrops in cavity and in the same time can improve the efficiency of aeration. Usually, the results of bottom slope with an ogee curve are better than that with a circular arc.

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Chatila, Jean, and Mazen Tabbara. "Computational modeling of flow over an ogee spillway." Computers & Structures 82, no. 22 (2004): 1805–12. http://dx.doi.org/10.1016/j.compstruc.2004.04.007.

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Chanel, Paul G., and John C. Doering. "Assessment of spillway modeling using computational fluid dynamics." Canadian Journal of Civil Engineering 35, no. 12 (2008): 1481–85. http://dx.doi.org/10.1139/l08-094.

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Throughout the design and planning period for future hydroelectric generating stations, hydraulic engineers are increasingly integrating computational fluid dynamics (CFD) into the process. As a result, hydraulic engineers are interested in the reliability of CFD software to provide accurate flow data for a wide range of structures, including a variety of different spillways. In the literature, CFD results have generally been in agreement with physical model experimental data. Despite past success, there has not been a comprehensive assessment that looks at the ability of CFD to model a range of different spillway configurations, including flows with various gate openings. In this article, Flow-3D is used to model the discharge over ogee-crested spillways. The numerical model results are compared with physical model studies for three case study evaluations. The comparison indicates that the accuracy of Flow-3D is related to the parameter P/Hd.

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Dissertations / Theses on the topic "Ogee spillway"

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Kanyabujinja, Nshuti Placide. "CFD modelling of ogee spillway hydraulics and comparison with physical model tests." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/96787.

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Thesis (MEng)--Stellenbosch University, 2015.<br>ENGLISH ABSTRACT: Modern Computational Fluid Dynamics modelling (CFD) are becoming common design and analysis tools in the engineering field. Nowadays, project designs involve the use of CFD techniques along with physical scale modelling to analyse the complex rapidly varied and turbulent flows which would not be easily analysed by physical modelling. In particular, the consideration and/or use of CFD modelling in the Hydraulic Engineering field remains on the increase. Apart from being used for comparison with other design techniques, CFD may in future become a standalone modelling technique in hydraulic structures design. This research aims to use CFD models to validate the simulation of the flow over two ogee dam spillways which are installed in the Hydraulic Laboratory of Stellenbosch University. To achieve this simulation of the flow which involves an interaction between water and air, the flow behaviour has been mapped by the Volume of Fluid (VOF) and the realisable "𝑘−𝜀" turbulence numerical models. The Volume of Fluid (VOF) and the realisable "𝑘−𝜀" models simulate the free surface of two-phase flow and the flow turbulence, respectively. Firstly, the study embarks with details on the actual design approaches of a typical ogee dam spillway. It subsequently presents the geometry and dimensions of the physical models, the testing procedure and the experimental test results achieved from this modelling exercise. For CFD modelling, a commercially available Computational Fluid Dynamics (CFD) package, Ansys-Fluent, was used. To model the physical model, the use of Reynolds-averaged Navier-Stokes equations in combination with the realisable k-ε eddy-viscosity closure model was adopted. The process of CFD model development and the underlying theory of it are discussed in this thesis. Different test scenarios including steady and fully hydrodynamic states simulation for two and three-dimensional geometries were considered in this simulation to achieve the most accurate results. In order to determine the required mesh size, the mesh sensitivity tests were conducted on the 2 dimensional and 3 dimensional models. Finally, the pressure readings and water levels produced by numerical models are discussed through a validation process by comparing the CFD model results with the results obtained from physical models. The outcome proved that CFD models are able to map the behaviour of both flow phases since they exhibited a close correlation to those achieved in the physical models. Even though some slight differences in values were revealed, the graphical trend remains reasonably similar for all test results.<br>AFRIKAANSE OPSOMMING: Moderne gerekenariseerde vloeidinamika numeriese modelle (CFD) word deesdae dikwels deur ingenieurs gebruik. Projekontwerpe sluit tans die gebruik van CFD tegnieke asook fisiese skaalmodellering in om komplekse, vinnig-veranderede en turbulente vloei te ontleed. Hierdie tipe vloeie is moeilik om met fisiese modellering te ontleed. Die gebruik van CFD numeriese modelle in hidrouliese ingenieurswese is besig om toe te neem, Die bevindinge van CFD modelering word tans vergelyk met die bevindinge van ander ontwerptegnieke, maar in die toekoms mag dit moontlik gebruik word as die enigste modelleringstegniek in hidrouliese struktuurontwerp. Die doel met hierdie navorsing is om CFD modelering te gebruik om die vloei oor twee ogee-vormige afvoergeute wat in die hidrouliese labrotorium van die Universiteit van Stellenbosch ge-installeer is, te ondersoek. Ten einde hierdie vloei, wat die interaksie tussen water en lug insluit, te simuleer, is die vloeigedrag deur ”volume van vloeistof” (VOF) en die "𝑘−𝜀" turbulensie numeriese modules, gemodeleer. Die VOF en "𝑘−𝜀" numeriese modules simuleer onderskeidelik die vry oppervlakte vloei van die twee-fase vloei en turbulente vloei. Die ontwerp van ’n tipiese ”ogee”-tipe dam oorloop word bespreek, gevolg deur die beskrywing van die geometrie van die fisiese modelle, die toetsprosedure en die eksperimentele toetsresultate. Vir die CFD modellering is die CFD pakket, Ansys-Fluent, gebruik. Vir die simulering van die fisiese model is die Reynolds-gemiddeld Navier-Stokes vergelykings tesame met die k-ε eddy-viskositeit geslote module gebruik. Die proses van CFD ontwikkeling en die onderliggende teorie daarvan word bespreek. Verskillende toets-scenario’s wat 2D en 3D simulasies insluit, uitgevoer. Ten einde die toepaslike berekeningsrooster grootte vir die numeriese model te verkry, is sensitiewiteitstoetse uitgevoer op die twee- en drie-dimensionele numeriese modelle. Laastens is die CFD numeries gesimuleerde drukke en die watervlakke met die van die fisiese modelle vergelyk om die akkuraatheid van die CFD resultate te verkry. Die uitkomstes het getoon dat CFD modelle gebruik kan word om die gedrag van albei vloei fases te simuleer aangesien dit goed vergelyk het met die uitkomstes van die fisiese modellering. Daar was wel klein verskille in die druk waardes, maar die tendense in drukverspreiding was ooreenstemmend.

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Coetzee, Gert Louis. "Investigating the bottom free surface nappe (Ogee profile) across a sharp-crested weir influenced by the flow in an asymmetrical approach channel." Diss., University of Pretoria, 2013. http://hdl.handle.net/2263/37353.

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3

Azhdary, Moghaddam Mehdi. "The hydraulics of flow on stepped ogee-profile spillways." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq26104.pdf.

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4

Chang, Chun-Kai, and 張鈞凱. "Experimental Study on Inlet Flow Field of Ogee Spillway." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/848j8c.

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碩士<br>國立交通大學<br>土木工程系所<br>102<br>In recent years, the ogee spillway weir surface of Chi-Chi Weir often wears after the flood. It is suspected that occurs, in addition to the damage arising from cavitation, abrasion occurs due to the gravels in front of the spillway picked up by flow vortex and dropped on spillway weir surface. Flow field in spillway inlet is complicated and three-dimensional, and few studies can be found in the past. Therefore, this study measures the inflow field of ogee spillway by using the particle image velocimetry to along the horizontal and vertical directions. The experimental results can be analyzed in the flow direction and in the depth direction. Along the flow direction, we can find a main recirculation vortex appears behind the upstream stepped bed, which is due to sudden cross-sectional expansion behind the stepped structure, and the associated adverse pressure gradient, drivers the flow with downward deflection. In addition, due to the occurrence of the main recirculation vortex, it will be accompanied underneath by a small corner eddy, and the two vortex’s direction of rotation are opposite. It can be considered as a deformed backward-facing step flow field. Along the depth direction, because of the existence of velocity difference between the wall and channel center line, top-down vortex tubes will occur at the intersection of the wall and top of the step. Also, due to the upstream anticline face of the weir and recirculation vortex, the top-down vortex tubes will extend downwardly at a fixed angle.

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Book chapters on the topic "Ogee spillway"

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Shaghaghian, M. R., and N. Talebbeydokhti. "Comparison of Several Finite Difference Schemes in Flow Modeling Over an Ogee Spillway." In Advances in Water Resources and Hydraulic Engineering. Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-89465-0_297.

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"ogee spillway." In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik. Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_150274.

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Sowinski, M., and M. I. Yusuf. "Composite risk model of Ogee type spillway." In New Uncertainty Concepts in Hydrology and Water Resources. Cambridge University Press, 1995. http://dx.doi.org/10.1017/cbo9780511564482.038.

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Furlan, P., M. Pfister, J. Matos, and A. J. Schleiss. "Blockage of driftwood and resulting head increase upstream of an ogee spillway with piers." In Sustainable and Safe Dams Around the World. CRC Press, 2019. http://dx.doi.org/10.1201/9780429319778-63.

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Khatsuria, R. M. "Ogee or Overflow Spillways." In Hydraulics of Spillways and Energy Dissipators. CRC Press, 2004. http://dx.doi.org/10.1201/9780203996980-4.

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"Ogee or Overflow Spillways." In Hydraulics of Spillways and Energy Dissipators. CRC Press, 2004. http://dx.doi.org/10.1201/9780203996980.ch4.

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Biering, C., S. Hong, T. Sturm, K. Yoon, and J. Gonzalez-Castro. "Evaluation of scour downstream of riprap aprons on low-head ogee spillways." In River Flow 2014. CRC Press, 2014. http://dx.doi.org/10.1201/b17133-281.

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Conference papers on the topic "Ogee spillway"

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Yıldız, Ali, Alpaslan Yarar, and Şerife Yurdagül Kumcu. "NUMERICAL MODELING OF FLOW OVER AN OGEE SPILLWAY AND INVESTIGATION OF EFFECT OF DOWNSTREAM INFLUENCES ON DISCHARGE." In International Symposium "The Environment and the Industry". National Research and Development Institute for Industrial Ecology, 2018. http://dx.doi.org/10.21698/simi.2018.fp09.

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Yıldız, Ali, and Alpaslan Yarar. "PHYSICAL MODELING OF FLOW OVER AN OGEE SPILLWAY AND INVESTIGATION OF SCALE EFFECTS BY USING FROUDE SIMILARITY." In International Symposium "The Environment and the Industry". National Research and Development Institute for Industrial Ecology, 2018. http://dx.doi.org/10.21698/simi.2018.fp13.

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Jafari-Asl, Jafar, Mohamed El Amine Ben Seghier, Sima Ohadi, and Vagelis Plevris. "SOFT COMPUTING FRAMEWORK FOR THE UNCERTAINTY-BASED OPTIMIZATION OF THE LENGTH AND HEIGHT OF OGEE-CRESTED SPILLWAY." In 14th International Conference on Evolutionary and Deterministic Methods for Design, Optimization and Control. Institute of Structural Analysis and Antiseismic Research National Technical University of Athens, 2021. http://dx.doi.org/10.7712/140121.7954.18433.

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Goodridge, W. H., W. J. Rahmeyer, M. A. Morrison, and Paul Costa. "Application of a Mitered Ogee Crest to Steep Stair-Stepped Spillways." In World Environmental and Water Resources Congress 2008. American Society of Civil Engineers, 2008. http://dx.doi.org/10.1061/40976(316)243.

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