Examinando por Materia "Hydraulic machinery"
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Ítem Caracterización de una turbina del tipo Francis utilizada por una empresa local de generación de energía(Universidad EAFIT, 2006) Gallego Betancur, Juan Esteban; Botero Herrera, Francisco JavierÍtem Diseño de una metodología para el balanceo de generadores de alto voltaje en ISAGEN S.A. ESP(Universidad EAFIT, 2010) Molina Delgado, Santiago; Arango Guerra, Santiago; Villegas López, Juan SantiagoÍtem Diseño y construcción de una máquina hidráulica dobladora de tubería redonda(Universidad EAFIT, 2009) Mena Mejía, Ana María; Arias Duque, Andrés; Cock Botero, DavidEl siguiente trabajo contiene el desarrollo del diseño y construcción de una máquina hidráulica dobladora de tubería redonda que realiza dobleces entre 0º y 180º -- Se tomó la decisión de construir la máquina dobladora para así aplicar los diferentes conocimientos adquiridos al cursar las carreras de Ingeniería Mecánica e Ingeniería de Producción -- El proyecto incluye un marco teórico que orienta al lector acerca del tema de doblez de tubería, y sobre los métodos y máquinas de doblado que existen en el mercado -- También contiene el diseño y la verificación de las principales partes de la máquina, los planos de todas las piezas, fotos del ensamble de las partes reales y un manual de operación y mantenimiento de la máquina -- Finalmente se incluyen recomendaciones y conclusiones basadas en los resultados obtenidos en cuanto al proceso de fabricación de la máquina y su desempeño, que pueden ser de gran ayuda para quien decida retomar este proyecto o construir una dobladora de este tipoÍtem Dynamic measurements on a Kaplan turbine: Model - Prototype comparison(Institute of Physics Publishing, 2019-01-01) Angulo M.; Lucino C.; Botero F.; Rivetti A.; Liscia S.; Angulo M.; Lucino C.; Botero F.; Rivetti A.; Liscia S.; Universidad EAFIT. Departamento de Ingeniería Mecánica; Mecánica AplicadaThe purpose of this paper is to validate in prototype, the results related to the description of dynamic behaviour obtained in a Kaplan turbine model. A comparative analysis between model and prototype measurement at homologous operation conditions is presented. The phenomena of interest are tip vortex cavitation development and rotor stator interaction (rsi), associated to operation at high power outputs. The selection of suitable signal processing tools allows a clear identification of the role played by the modulation of the main rsi frequencies on cavitation phenomena. The comparison between pressure acceleration measurements on model and prototype at draft tube wall are consistent, both in time and frequency domain analysis. The acceleration measurement at the draft tube wall (manhole) is suggested as a trustworthy dynamic indicator for prediction (model) and monitoring (prototype) purposes. © 2019 Published under licence by IOP Publishing Ltd.Ítem Dynamic measurements on a Kaplan turbine: Model - Prototype comparison(Institute of Physics Publishing, 2019-01-01) Angulo M.; Lucino C.; Botero F.; Rivetti A.; Liscia S.; Universidad EAFIT. Departamento de Ingeniería Mecánica; Estudios en Mantenimiento (GEMI)The purpose of this paper is to validate in prototype, the results related to the description of dynamic behaviour obtained in a Kaplan turbine model. A comparative analysis between model and prototype measurement at homologous operation conditions is presented. The phenomena of interest are tip vortex cavitation development and rotor stator interaction (rsi), associated to operation at high power outputs. The selection of suitable signal processing tools allows a clear identification of the role played by the modulation of the main rsi frequencies on cavitation phenomena. The comparison between pressure acceleration measurements on model and prototype at draft tube wall are consistent, both in time and frequency domain analysis. The acceleration measurement at the draft tube wall (manhole) is suggested as a trustworthy dynamic indicator for prediction (model) and monitoring (prototype) purposes. © 2019 Published under licence by IOP Publishing Ltd.Ítem Modelación geométrica del impulsor de una bomba centrífuga(Universidad EAFIT, 2010) Sierra Pérez, Sebastián; Orrego Bustamante, SantiagoEl proyecto de grado Modelación Geométrica del Impulsor de una Bomba Centrífuga, busca desarrollar la construcción de un modelo digital del impulsor en acero inoxidable para una bomba marca Goulds, del modelo con diámetro, con los recursos y herramientas disponibles en la universidad EAFIT -- El diseño del modelo digital, se realizará utilizando herramientas de diseño asistidas por computador CAD (Computer Aided Design), y de análisis de la dinámica de fluidos CFD (Computational Fluid Dynamics), con el apoyo de técnicas de Ingeniería Inversa y herramientas de metrología, de tal forma que el modelo digital diseñado tenga las características de la pieza real -- El análisis de la forma geométrica de la pieza es el primer paso para su reconstrucción digital -- En esta etapa se busca obtener toda la información sobre las medidas geométricas más influyentes en el comportamiento del fluido, como son: la curvatura de los álabes, el diámetro del rodete, el diámetro de la entrada del fluido y la forma del contorno de las tapas superior e inferior -- Para garantizar la similitud geométrica entre el modelo digital y el modelo real del impulsor, el proyecto utilizará el método de evaluación establecido por la norma IEC 60193 de IEC (International Electrotechnical Commission)Ítem Montaje y evaluación en laboratorio de un sistema prototipo de pico-generación hidroeléctrica con una turbina Michell - Banki(Universidad EAFIT, 2012) Llano Velásquez, Enrique Alberto; Mira Hernández, CarolinaÍtem Optimización de tiempos de operación y de no funcionalidad en Bomba Alimentación de Agua de Caldera - BAAC, de un ingenio con análisis RAM(Universidad EAFIT, 2014) Loaiza Sánchez, Héctor William; Mora Gutiérrez, Luis AlbertoÍtem Study of the effect of the geometrical parameters of the runner and operation conditions on performance and flow characteristics in a cross flow turbine(Universidad EAFIT, 2014) Peláez Restrepo, Juan Diego; París Londoño, Luis SantiagoDue to technological development, massive use of technology, and accelerated population growth in some regions of the planet, the use of renewable energy sources is important to match the increasing electric energy demand -- Hydropower is an important source of renewable energy around the world, due to its simple but efficient way to provide clean electricity generation -- Currently, the cross flow turbine also known as Banki-Turbine has been increasingly used in many places around the world due to its simple structure, modest efficiency and its good performance in small and low head hydroelectric applications -- It is presumed that the massive utilization of this turbines has been limited due to its low efficiency compared to other turbines with efficiencies near to 90% -- Improving this turbine efficiency would make it more attractive and competitive -- This can be achieved by means of studying the turbine operation and determining the most significant parameters in its performance -- Therefore, the interest of this work is to investigate the performance of the cross flow turbine and the flow characteristics through the turbine -- Two kind of analysis are performed in this work -- The objective of the first analysis is to perform experimental tests of some cross flow turbine prototypes under different operating conditions, and determine its performance -- Due to the differences in the geometrical parameters of the runner on every prototype, an extensive work of design, manufacture and assemble was required for the execution of the experiments in order to obtain satisfactory results -- In the second analysis, CFD simulations of the prototypes are performed with the objective of visualizing the flow through the turbine -- Results show that the turbines with the geometrical parameters selected have a poor performance (approx 50%) under the operating conditions tested -- The prototypes with the best performance are those where the nozzle leads the water to a well defined cross flow in the runner, and the water absolute velocity when entering the runner first and second stage corresponds well to the blade angles -- The prototypes tested show a disordered flow pattern through the runner with big recirculation zones and poorly correspondence with the water velocity vectors and the blade angles, which increases losses and leads to lower efficienciesÍtem Study of the state a Francis turbine(Politechnika Gdanska, Wydzial Oceanotechniki i Okretownictwa, 2013-04-01) Zóltowski, M.; Zóltowski, B.; Castaneda, L.; Universidad EAFIT. Departamento de Ingeniería Mecánica; Estudios en Mantenimiento (GEMI)This paper presents a methodology to evaluate the technical state of a Francis turbine by shaft rotor dynamic simulation. There are several rotor dynamic criteria that define the technical state of a turbo-machine. To feed the shaft rotor dynamic model this delivers the required information to accomplish the technical assessment. The numerical rotor dynamic model uses as input, the field forces obtained by the fluid-solid interaction analysis undertaken over the blades of the runner. The rotor dynamic numerical simulations allow to determinate the record-in-time of the displacements of any point along the shaft. This information is relevant for diagnosis tasks, because it is possible to decompose it spectrally and to estimate the severity of the vibrations. Comparing the results of the numerical model against those obtained from machines that operates under normal conditions, it is possible to determinate the technical state of the turbo-machine. This allows studying the stability of the turbine working on several operation ranges. A Francis turbine is a very complex machine that involves many physical phenomena of different nature. In this way, the hydraulic input forces needed by the rotor dynamic model should not be assumed but calculated directly from the fluid interaction over the turbine structure.Ítem Viabilidad técnica-económica de implementar una bomba como pico turbina para suministrar energía eléctrica a una escuela rural(Universidad EAFIT, 2011) Quintero Ramírez, Juan Camilo; Villamizar Llano, Alejandro; Mira Hernández, Carolina