Now showing items 1-20 of 33

    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 ...

    Study of the dynamic behavior of Pelton Turbines 

    Egusquiza Montagut, Mònica (Date of defense: 2020-02-14)

    The future of hydropower is tied to the rapid increase of new renewable energies, such as photovoltaic and wind energy. With the growing share of intermittent electricity production, the operation of hydropower installations ...

    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 ...

    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 ...

    Assessment of gas-surface interaction modelling for lifting body re-entry flight design 

    Viladegut Farran, Alan (Date of defense: 2017-12-01)

    Space re-entry is a challenging endeavor due to the harsh thermo-chemical environment around the vehicle. Heat flux being the reference parameter for Thermal Protection System (TPS) design, the total energy transfer can ...

    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 ...

    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 ...

    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 ...

    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 ...

    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 ...

    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 ...

    Analysis of the dynamic behaviour of rotating disk-like structures submerged and confined 

    Presas, Alex (Date of defense: 2014-11-27)

    The analysis of the dynamic behaviour of rotating turbomachinery components is of relevant interest to avoid damages or fatigue problems in these parts. To determine the dynamic behaviour of a part of a structure it is ...

    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 ...

    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 ...

    Caracterització del flux a causa de la interacció rotor-estator en turbomàquines mitjançant CFD 

    Fontanals García, Alfred (Date of defense: 2013-02-15)

    A les turbomàquines pot haver una forta interacció entre els àleps del rodet i les directrius del difusor que afecten la dinàmica del flux i el rendiment estructural de les màquines. Aquest fenomen s’anomena interacció ...

    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 ...

    Analysis of the suction chamber of external gear pumps and their influence on cavitation and volumetric efficiency 

    Campo Sud, David del (Date of defense: 2012-04-27)

    Hydraulic machines are faced with increasingly severe performance requirements. The need to design smaller and more powerful machines rotating at higher speeds in order to provide increasing efficiencies, has to face a ...

    CFD Analysis of an axial piston pump 

    Kumar, Sushil (Date of defense: 2010-07-16)

    En el ámbito de la Oleohidráulica, las bombas de pistón poseen los diseños más sofisticados, de hecho, las bombas de pistones son las únicos capaces de trabajar a altas presiones, además de poseer el mejor rendimiento de ...