Departament de Mecànica de Fluids: Recent submissions
Now showing items 6-25 of 34
Assessment of gas-surface interaction modelling for lifting body re-entry flight design
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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 ...
Estudio experimental del proceso de calentamiento de medios porosos saturados hasta ebullición-"Dryout" de su fase líquida
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 ...
Optimización de suspensiones hidroneumáticas con amortiguador integrado
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 ...
Acció del vent sobre una estructura. Anàlisi teòric i experimental
Aquest treball s'estructura a partir d'una sèrie de reflexions que es contextualitza a partir de la voluntat de sistematitzar l'estudi de l'acció del vent sobre un edifici o una estructura. Després de diferents períodes ...
Proposta metodològica per a l'anàlisi de la sostenibilitat, utilitzant indicadors i índexs, implementats i analitzats amb una eina de suport al raonament. Cas d'estudi: municipi de Terrassa
Les ciutats d'avui en dia es caracteritzen per un progressiu creixement de la població dins un territori físic limitat. Aquest creixement comporta problemes diversos, com ara la falta d'autocontenció de la ciutat; la ...
