Now showing items 21-34 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 ...

    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 ...

    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 ...

    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 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 ...

    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 ...

    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 ...

    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 ...

    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 ...

    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 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 ...

    Study of the flow around a square cylinder with an upstream splitter plate 

    Elmansy, Reda Mohamed Yousyf Abdallah (Date of defense: 2023-01-19)

    (English) This PhD mostly focuses in studding the flow around a square cylinder with an upstream splitter plate and considering different velocity ratios between the upper and lower inlet velocities. The PhD is based in ...