Programa de Doctorat en Enginyeria Mecànica, Fluids i Aeronàutica: Recent submissions
Now showing items 81-100 of 106
Novel lubrication system to improve the excessive wear in wind turbine yaw and pitch gears
Manufacturers of wind turbines have observed a new phenomenon that appears in high power wind turbines: excessive wear in the teeth located at 0º in the pitch bearing. In order to design more efficient wind turbines, ...
Minimisation of the wire position uncertainties of the new CERN vacuum wire scanner
The particle production of an accelerator is characterised by the accelerated species of particles, by their number and energy. The particle rate is determined by the production cross section, a natural constant and the ...
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 ...
Electropulsing to assist conventional manufacturing processes
This thesis presents a study on the variation of the mechanical properties of some materials. These variations are registered for processes as bottom bending, wire drawing or round turning, which are performed under high ...
Analysis and design of a capillary driven blood plasma separation microfluidic device
Recently, the emergence of lab-on-a-chip devices has seen in a variety of applications especially in clinical analys is and diagnostics. ln particular the lack of suitable microdevices for separation of plasma from whole ...
Analysis and simulation of a synergetic environmental control and life support system for long duration spaceflight
Manned missions carried out in the last decades were either close to Earth or short missions. In contrast, Space Agencies future plans include manned exploration missions to asteroids, the Moon and finally Mars. The expected ...
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 ...
Direct current insulator based dielectrophoresis (DC-iDEP) microfluidic chip for blood plasma separation
Lab-on-a-Chip (LOC) integrated microfluidics has been a powerful tool for new developments in analytical chemistry. These microfluidic systems enable the miniaturization, integration and automation of complex biochemical ...
Estudio del proceso de bruñido con bola asistido por una vibración
The aim of this thesis is studying and characterizing a ball burnishing process assisted with vibrations. By introducing vibrations in the overall process, results are enhanced if compared to the ones derived from a ...
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 ...
Study of the exfoliation process in epoxy-clay nanocomposites
Cured epoxy resins are highly cross-linked polymers which are increasingly important in high performance engineering field due to the stiffness, high strength, heat resistance and solvent resistance. However one major ...
Mecanismes de lleves conjugades amb palpador de corrons. Aportació a l'estudi de la fallada per fatiga superficial
This thesis presents the dynamic study of conjugate cam mechanisms with rollers follower and translational movement, to design them with the aim of retard the surface fatigue failure in the rollers. The premature failure ...
Contribució als algoritmes de construcció de models del món per a la implementació en Arquitectures Àgils de Fabricació
The present work composes a contribution towards the Construction of World models for its implementation in 'Agile Manufacturing Architectures', aiming to take a step further the control programs for manufacturing systems, ...
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 ...
A dynamical model of a double-deck circular tunnel embedded in a full-space
This thesis presents a three-dimensional dynamic model of a double-deck circular tunnel embedded in a full-space. The model uses the receptance method to obtain the response of the complete structure from the response of ...
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 ...
Detection of failure mechanisms of tool steels by means of acoustic emission technique
This thesis is focused on the calibration of the Acoustic Emission (AE) technique to detect and identify damage mechanisms in tool steels. The AE measurement procedure has been calibrated for two mechanical tests: fracture ...
Passive acoustic method for aircraft localization
The present thesis investigates a passive acoustic method to locate maneuvering aircraft. The method is based on the acoustical Doppler effect, as a particular effect of the signals received by a mesh of spatially distributed ...
Integración de conocimiento en la subcontratación estratégica de diseño de producto
La motivació d'aquesta tesi és entendre com pot ser gestionada la integració de coneixement en projectes de subcontractació estratègica de disseny de producte. Una participació activa de l'empresa durant la realització de ...
