Now showing items 11-30 of 34

    Design tools applied to a trochoidal gear pump 

    García Vílchez, Mercedes (Date of defense: 2014-07-31)

    Positive displacements pumps, as currently designed, produce significant flow pulsations that result in pressure pulsations. These pulsations contribute to the global noise generated by the installation. Moreover, they ...

    Effects of flow control on flow past bluff bodies 

    Mushyam, Aditya (Date of defense: 2016-11-23)

    The aim of this Ph.D. thesis, "Effects of flow control on flow past bluff bodies" is to study and analyzes the effects of Flow Control on various aspects and proverbs of flow past bluff bodies. Flow control techniques are ...

    Energy efficiency of high pressure pneumatic systems 

    Trujillo, José A. (Date of defense: 2015-11-27)

    The energy efficiency assessment of high-pressure pneumatic circuits is the aim of this dissertation. From a historical perspective the past and cur- rent activities with regards to the energy saving conservation in pneumatic ...

    Estudio cinemático y dinámico de un sólido elástico giratorio accionado mediante un servoactuador hidráulico 

    Freire Venegas, Francisco Javier (Date of defense: 2003-01-31)

    El conocimiento del comportamiento de los sistemas con elementos flexibles es cada vez mas importante en la técnica moderna. La notable mejora de las prestaciones dinámicas que comporta la reducción de la masa de los ...

    Estudio de la rigidez neumática de suspensiones para vehículos 

    Guijón Amengual, Manuel (Date of defense: 2006-10-06)

    La Tesis en cuestión presenta un estudio sobre el comportamiento de la rigidez de una suspensión neumática, así como de los parámetros que la definen y/o afectan.<br/>El trabajo realizado propone un modelo capaz de predecir ...

    Estudio de mezclas de refrigerantes para un circuito frigorífico aplicado a la deshumidificación del aire 

    Cánovas Bermejo, Catalina (Date of defense: 2016-01-21)

    The present thesis is undertaken to study the use of an aqueous solution of LiCl as a secondary refrigerant, due to its dehydrating properties, in those refrigeration applications that require mainly the air dehumidification ...

    Estudio experimental del proceso de calentamiento de medios porosos saturados hasta ebullición-"Dryout" de su fase líquida 

    Carbonell Ventura, Montserrat (Date of defense: 2000-02-04)

    La experimentación y posterior modelización de los procesos de transporte y transferencia de calor y de masa en medios poroso saturados encuentra un gran número de dificultades que se derivan fundamentalmente de la ...

    Experimenal study of the aerodynamics of a horizontal axis wind turbine 

    Campo Gatell, Vanessa del (Date of defense: 2013-03-22)

    One of the challenges of the wind energy community today is to improve the existing background on the aerodynamic phenomena of a Horizontal Axis Wind Turbine (HAWT), the prediction of the wind speed distribution on the ...

    Experimental investigation of induced supersonic boundary layer transition 

    Bottini, Henny (Date of defense: 2014-03-28)

    Turbulence onset within an initially laminar flow is one of the most common phenomenon in Fluid Mechanics, yet is an open field of research. This is due to the many and diverse causes that can trigger turbulence, which ...

    Fluid dynamic characterization of vortex generators and two-dimensional turbulent wakes 

    Fernández Gámiz, Unai (Date of defense: 2013-11-26)

    The main objective of this PhD thesis is the fluid dynamic characterization of the flow behind vortex generators (VG) as well as to investigate their influence in the separation of the boundary layer. CFD simulations have ...

    Influence of cavitation on the dynamic response of hydrofoils 

    Torre Rodríguez, Oscar de la (Date of defense: 2013-02-26)

    The dynamic response of any structure submerged in water is significantly modified by the effect of added mass. The inertia of the fluid that the body must accelerate during its vibrational motion decreases its natural ...

    Influence of the boundary conditions on the dynamic behavior of large hydraulic machines 

    Valentín Ruiz, David (Date of defense: 2018-01-23)

    Nowadays, hydropower plays an essential role in the energy market. With the massive entrance of new renewable sources such as wind or solar power, hydropower is the only renewable generating source that can provide fast ...

    Metodologia per a la miniaturització de components oleohidràulics. 

    Huguet Ballester, David (Date of defense: 2006-07-20)

    La Tesi en qüestió presenta una metodologia per a l'estudi de les Vàlvules Limitadores de Pressió i concretament en les que presenten un tamany reduït, taps de 10 [mm] i amb seccions de pas de fins a 2 [mm], amb prestacions ...

    Modelización de los procesos de conformado en caliente de los aceros microaleados de medio carbono mediante la aplicación de redes neuronales artificiales 

    Alcelay Larrión, José Ignacio (Date of defense: 2015-09-10)

    In this thesis a study was performed to obtain a model of artificial neural network that is able to predict the flow behavior of steel under hot deformation conditions. The hot compression tests are performed on two types ...

    A novel optimization methodology of modular wiring harnesses in modern vehicles : weight reduction and safe operation 

    Rius Rueda, Armand (Date of defense: 2017-06-02)

    The weight of electric and electronic components of cars has been uninterruptedly increasing through the last decades, and thus the weight of their wiring harnesses. This fact has awakened the interest of car manufacturers ...

    Numerical and experimental investigation of spectral domain vibration based indicators for structural health monitoring 

    Serra López, Roger (Date of defense: 2018-05-22)

    Structural health monitoring has been defined as the acquisition, validation and analysis of technical data to facilitate life- cycle management decisions. It is the result of a convergent path from many previous existing ...

    Numerical investigation on applications simulated via using lattice Boltzmann method 

    An, Bo (Date of defense: 2019-12-12)

    The present doctoral thesis is about the numerical investigation simulated via using lattice Boltzmann method (LBM), the applications cover a large scale of subjects, including 1. Mathematical-physical equations A new ...

    On the changes in dynamic behavior produced by the hydraulic turbine runner damage 

    Zhang, Ming (Date of defense: 2019-07-17)

    Hydropower plays a very important role in the world electricity generation nowadays. Hydropower is one type of renewable energy and is the only renewable energy source that can provide a wide range of power regulation with ...

    Optimización de suspensiones hidroneumáticas con amortiguador integrado 

    Heras, Salvador de las (Date of defense: 1997-02-26)

    En esta Tesis Doctoral se desarrollan los principios básicos que rigen el comportamiento dinámico de un cilindro de suspensión hidroneumática, concibiendo métodos que lo optimizan y explotan al máximo sus propiedades ...

    Posibles escenarios futuros mundiales de emisiones y absorciones de CO2 y cumplimiento de los acuerdos de Kyoto 

    Felipe Blanch, José Juan de (Date of defense: 2004-07-21)

    El problema de las emisiones y su efecto directo, el cambio Climático que sufre el planeta, es de ámbito mundial, global, y en él interviene de manera directa el ser humano, como individuo y como sociedad. Esta Tesis, ...