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Dissertations / Theses on the topic 'Tip Gap'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Cao, Dekun Carleton University Dissertation Engineering Mechanical. "Flow in an idealized turbine tip gap." Ottawa, 1993.

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2

Anto, Karu. "Effects of Tip Clearance Gap and Exit Mach Number on Turbine Blade Tip and Near-Tip Heat Transfer." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/76764.

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The present study focuses on local heat transfer characteristics on the tip and near-tip regions of a turbine blade with a flat tip, tested under transonic conditions in a stationary, 2-D linear cascade consisting of seven blades, the three center blades having a variable tip clearance gap. The effects of tip clearance and exit Mach number on heat transfer distribution were investigated on the tip surface using a transient infrared thermography technique. In addition, thin film gages were used to study similar effects on the near-tip regions at 94% based on engine blade span of the pressure an

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3

Yaras, Metin Ilbay Carleton University Dissertation Engineering Mechanical. "Flow in the tip gap of a rectilinear turbine cascade." Ottawa, 1987.

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4

Leung, Kai Yuen Eric. "3D turbine tip clearance flow redistribution due to gap variation." Thesis, Massachusetts Institute of Technology, 1991. http://hdl.handle.net/1721.1/42513.

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5

Barrows, Sean Thomas. "TURBO Turbulence Model Validation with Recommendations to Tip-Gap Modeling." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1213373781.

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6

Yang, Timothy T. "An experimental investigation of turbine blade tip heat transfer and tip gap flows in the supersonic regime." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-07112009-040445/.

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7

Couch, Eric L. "Measurements of Cooling Effectiveness Along the Tip of a Turbine Blade." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/76815.

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In a gas turbine engine, turbine blades are exposed to temperatures above their melting point. Film-cooling and internal cooling techniques can prolong blade life and allow for higher engine temperatures. This study examines a novel cooling technique called a microcircuit, which combines internal convection and pressure side injection on a turbine blade tip. Holes on the tip called dirt purge holes expel dirt from the blade, so other holes are not clogged. Wind tunnel tests are used to observe how effectively dirt purge and microcircuit designs cool the tip. Tip gap size and blowing ratio are

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8

Tian, Qing. "Some Features of Tip Gap Flow Fields of a Linear Compressor Cascade." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/9673.

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This thesis presents some results from an experimental study of three-dimensional turbulent tip gap flows in the linear cascade wind tunnel, for two different tip gap clearances (t/c=1.65% and 3.3%). The experiments focus on near-wall flow field measurements for the stationary wall and moving wall, and static pressure measurement on the low end-wall for the stationary wall case. The representative flows were pressure driven, three-dimensional turbulent boundary layers in the linear cascade tunnel for the stationary wall case, and the combination of the pressure driven and shear driven flow for

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9

Hohlfeld, Erik Max. "Film Cooling Predictions Along the Tip and Platform of a Turbine Blade." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/76781.

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Turbine airfoils are exposed to the hottest temperatures in the gas turbine with temperatures typically exceeding the melting point of the blade material. Cooling methods investigated in this computational study included parasitic cooling flow losses, which are inherent to engines, and microcircuit channels. Parasitic losses included dirt purge holes, located along the blade tip, and platform leakage flow, which result from gaps between various turbine components. Microcircuits are a novel cooling technique involving small air passages placed near the airfoil surface to enhance internal coo

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10

Fordham, Guangli Chen. "A numerical and experimental investigation of two-dimensional compressible turbine tip gap flow." Thesis, University of Cambridge, 1994. https://www.repository.cam.ac.uk/handle/1810/251713.

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11

Morris, Angela. "Experimental and Computational Study of Heat Transfer on a Turbine Blade Tip with a Shelf." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/76906.

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Cooling of turbine parts in a gas turbine engine is necessary for operation as the temperature of combustion gases is higher than the melting temperature of the turbine materials. The gap between rotating turbine blades and the stationary shroud provides an unintended flow path for hot gases. Gases that flow through the tip region cause pressure losses in the turbine section and high heat loads to the blade tip. This thesis studies the heat transfer on an innovative tip geometry intended to help reduce aerodynamic losses. The blade tip has a depression (shelf) on the tip surface along much of

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12

Tang, Genglin. "Measurements of the Tip-gap Turbulent Flow Structure in a Low-speed Compressor Cascade." Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/11178.

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This dissertation presents results from a thorough study of the tip-gap turbulent flow structure in a low-speed linear compressor cascade wind tunnel at Virginia Tech that includes a moving belt system to simulate the relative motion between the tip and the casing. The endwall pressure measurements and the surface oil flow visualizations were made on a stationary endwall to obtain the flow features and to determine the measurement profiles of interest. A custom-made miniature 3-orthogonal-velocity-component fiber-optic laser-Doppler velocimetry (LDV) system was used to measure all three compon

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13

Staubs, Joshua Kyle. "Correlation between Unsteady Loading and Tip Gap Flow Occurring in a Linear Cascade with Simulated Stator-Rotor Interaction." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/33494.

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This thesis presents the results of a study performed in the Virginia Tech low speed linear cascade wind tunnel operating at a Reynolds number of 382,000 designed to model an axial compressor rotor. To simulate the flow created by the junction of a set of inlet guide vanes and the compressor casing, vortex generators were glued to a moving end wall. In this investigation, the tip clearance was varied from 0.83% to 12.9% chord. Measurements of the midspan and the tip blade loading were made using static pressure taps. The tip loading shows that the minimum suction surface pressure coefficie

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14

Berglund, Albin. "Evolution of Cavity Tip Vortices in High-Pressure Turbines." Thesis, Uppsala universitet, Elektricitetslära, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-329369.

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This degree project in applied physics studies the tip gap flows over the rotor blades of a high-pressure turbine. The rotor blade used in the study has an improved design that utilizes both a cavity tip and an uneven profiling to reduce turbine loss. The designed rotor blade is shown to admit a 21% lower leakage mass flow rate across the tip gap than a reference rotor blade with a flat tip. By studying the designed rotor blade using transient CFD, the flow field of the tip gap region has been studied through one blade passage. The flow field characteristics of particular interest are the leak

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15

Thomas, Gregory Alexander. "The effect of a casing geometry modification on blade tip-gap aero-thermodynamics in a transonic, high-pressure turbine." Thesis, University of Oxford, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.443002.

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16

Tian, Qing. "Near Wall Behavior of Vortical Flow around the Tip of an Axial Pump Rotor Blade." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/30062.

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This dissertation presents the results from an experimental study of three-dimensional turbulent tip gap flow in a linear cascade wind tunnel with 3.3% chord tip clearance with and without moving endwall simulation. Experimental measurements have been completed in Virginia Tech low speed linear cascade wind tunnel. A 24" access laser-Doppler velocimeter (LDV) system was developed to make simultaneous three-velocity-component measurements. The overall size of the probe is 24"Ã 37"Ã 24"and measurement spatial resolution is about 100 Î¼m. With 24" optical access distance, the LDV probe allows mea

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17

Deveaux, Benjamin. "Analyse et contrôle de l'écoulement de jeu d'une aube fixe isolée." Thesis, Paris, HESAM, 2020. http://www.theses.fr/2020HESAE009.

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L’objectif de cette ´étude est de d´écrire en détail l´écoulement de jeu afin d’en ´évaluer la sensibilité´e auxparamètres de conception ainsi que la r´réceptivité´e `a des dispositifs de contrôle par injection d’air au carter. Pourcela, on considère une géométrie simplifiée qui est constituée d’une aube fixe isolée, placée perpendiculairement `aune plaque plane représentant le carter. L’analyse de cette configuration simplifiée s’appuie sur la complémentarité´edes mesures en soufflerie et simulations numériques. La taille du jeu est le paramètre principal qui affectel’écoulement de jeu. L’épa

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18

Mårtensson, Jonathan. "Method development for investigation of real effects on flow around vanes." Thesis, Linköping University, Applied Thermodynamics and Fluid Mechanics, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-57605.

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<p>In the development of turbo machinery components it's desirable to not spend more time than necessary when setting up aero-thermal calculations to investigate uncertainties in the design. This report aims to describe general thoughts used in the development of an ICEM-mesh script and the possible configurations in the script file which enables the user to build mesh-grids with/without clearance gap at the hub and/or shroud for different blade geometries. It also aims to illustrate the performance analysis made on the Vinci LH2 turbine, a next generation upper stage engine to the Ariane 5 ro

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19

Kuhl, David Derieg. "Near Wall Investigation of Three Dimensional Turbulent Boundary Layers." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/34676.

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This report documents the experimental study for four different three-dimensional turbulent flows. The investigation focuses on near wall measurements in these flows. Several experimental techniques are used in the studies; however, the bulk of the investigation focuses on a three-orthogonal-velocity-component fiber-optic laser Doppler anemometer (3D-LDA) system. The control volume of the 3D-LDA is on the order of 50 micro-meter in size, or a y<sup>+</sup> distance of around 2.3 units (using average values of U<sub>&#964</sub> and ν from the experiment). An auxiliary small boundary laye

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20

Margalida, Gabriel. "Analyse expérimentale et contrôle actif de l'écoulement dans un compresseur axial mono-étagée durant la transition vers le décrochage tournant." Thesis, Paris, ENSAM, 2019. http://www.theses.fr/2019ENAM0039.

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Durant la dernière décennie, le secteur aéronautique n’a cessé de croître et le nombre de passagers transportés a considérablement augmenté. En parallèle, des politiques de plus en plus restrictives ont été mises en place afin de diminuer notre impact environnemental notamment en réduisant les émissions de CO2. Dans cette optique, les motoristes cherchent à concevoir des moteurs plus efficaces, conduisant à l’utilisation de points de fonctionnement plus proches des limites d’opération et a un chargement des étages de compression plus important. Cependant, ces zones étant sensibles au déclenche

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21

Murray, Henry Hall IV. "Turbulence and Sound Generated by a Rotor Operating Near a Wall." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/71332.

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Acoustic and aerodynamic measurements have been carried out on a rotor operating in a planar turbulent boundary layer near a wall for a variety of thrust conditions and yaw angles with respect to the inflow. At the highest thrust condition a strong flow reversal in the wall-rotor tip gap was observed. Average velocity fields filtered by the angular position of the rotor show that the flow reversal is fed by jets of fluid that tend to form below the blade as it passes by the wall. Instantaneous velocity measurements show the presence of strong vortices in the tip gap. These vortices were ch

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22

Storer, John Andrew. "Tip clearance flow in axial compressors." Thesis, University of Cambridge, 1991. https://www.repository.cam.ac.uk/handle/1810/251503.

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23

Chen, Xiao-Qi. "Sensor based automatic control system for narrow gap TIG welding." Thesis, University of Liverpool, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278614.

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24

O'Dowd, Devin Owen. "Aero-thermal performance of transonic high-pressure turbine blade tips." Thesis, University of Oxford, 2010. http://ora.ox.ac.uk/objects/uuid:e7b8e7d0-4973-4757-b4df-415723e7562f.

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25

Deng, Quanrong. "Band gap tuning and structural engineering of TIO₂ for photocatalysis and solar cells." Thesis, University of Bolton, 2012. http://ubir.bolton.ac.uk/811/.

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To tackle with the energetic and environmental problems for sustainable development, titanium dioxide ( TIO₂) has attracted extensive scientific interests for its outstanding performances in photocatalytic decomposition of organic molecules and its application in solar cells. This work aims at a fundamental break through towards significant reduction of TIO₂ band gap via doping, since the functionality for pure TIO₂can be excited only by ultraviolet (UV) light that only accounts for less than 5% of solar irradiance because of the wide band gaps (3.2 eV for anatase and 3.0 eV for rutile), as we

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26

Chivers, John William Hender. "A technique for the measurement of blade tip clearance in a gas turbine." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/7408.

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27

Ekong, Godwin I. "Tip clearance control concepts in gas turbine H.P. compressors." Thesis, University of Sussex, 2014. http://sro.sussex.ac.uk/id/eprint/48906/.

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28

Doukelis, Angelos F. "Study of the flowfield in the tip clearance region of compressor bladings." Thesis, Cranfield University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267342.

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29

Cunha, Mónica Rodeia Fortes da. "A passagem de trabalho presencial para teletrabalho : gap de competências digitais." Master's thesis, Instituto Superior de Economia e Gestão, 2021. http://hdl.handle.net/10400.5/21639.

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Mestrado em Ciências Empresariais<br>No contexto das medidas de combate à pandemia COVID-19, a utilização de tecnologias digitais assumiu um papel importante, obrigando à mobilização de competências no trabalho diferentes das normalmente colocadas em prática. Este trabalho procura, de forma exploratória, compreender quais as competências digitais onde aqueles que passaram para teletrabalho mais sentem dificuldades (GAP de competências), e como tais dificuldades podem ser ultrapassadas. Adicionalmente, testa-se a relação do GAP de competências com a satisfação no trabalho. Através do noss

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30

Pigozzo, Ivan Olszanski. "Soldagem tig orbital." reponame:Repositório Institucional da UFSC, 2015. https://repositorio.ufsc.br/xmlui/handle/123456789/134664.

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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Mecânica, Florianópolis, 2015.<br>Made available in DSpace on 2015-09-01T04:08:13Z (GMT). No. of bitstreams: 1 333915.pdf: 4133920 bytes, checksum: 1b34cf9df89bff0c5aae2af3eebd3b68 (MD5) Previous issue date: 2015<br>As obras de construção de tubulações e dutovias para o transporte de matéria, principalmente na indústria do petróleo e gás, apresentam na atualidade constante crescimento, causando relevantes impactos econômicos e produtivos para o desenvolvimento do país.

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31

Christophel, Jesse Reuben. "Comparison of the Thermal Performance of Several Tip Cooling Designs for a Turbine Blade." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/76870.

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Gas turbine blades are subject to harsh operating conditions that require innovative cooling techniques to insure reliable operation of parts. Film-cooling and internal cooling techniques can prolong blade life and allow for higher engine temperatures. This study examines several unique methods of cooling the turbine blade tip. The first method employs holes placed directly in the tip which inject coolant onto the blade tip. The second and third methods used holes placed on the pressure side of a blade near the tip representative of two different manufacturing techniques. The fourth method

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32

Choi, Myeonggeun. "Thermal control of gas turbine casings for improved tip clearance." Thesis, University of Oxford, 2015. https://ora.ox.ac.uk/objects/uuid:14a9ce6a-2af6-4187-afe7-8c6f8e113855.

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A thermal tip clearance control system provides a robust and flexible means of manipulating the closure between the casing and the rotating blade tips in a jet engine, reducing undesirable tip leakage flows. This may be achieved using an impingement cooling scheme on the external casing of the engine in conjunction with careful thermal management of internal over-tip seal segment cavity. For a reduction in thrust specific fuel consumption, the mass flow rate of air used for cooling must be minimised, be at as low a pressure as possible and delivered through a light weight structure surrounding

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33

Meesala, Vamsi Chandra. "Modeling and Analysis of a Cantilever Beam Tip Mass System." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/83378.

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We model the nonlinear dynamics of a cantilever beam with tip mass system subjected to different excitation and exploit the nonlinear behavior to perform sensitivity analysis and propose a parameter identification scheme for nonlinear piezoelectric coefficients. First, the distributed parameter governing equations taking into consideration the nonlinear boundary conditions of a cantilever beam with a tip mass subjected to principal parametric excitation are developed using generalized Hamilton's principle. Using a Galerkin's discretization scheme, the discretized equation for the first mode i

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34

Tang, Brian M. T. "Unshrouded turbine blade tip heat transfer and film cooling." Thesis, University of Oxford, 2011. http://ora.ox.ac.uk/objects/uuid:f8479e89-9cd1-4aa7-b5c8-8068ad80de54.

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This thesis presents a joint computational and experimental investigation into the heat transfer to unshrouded turbine blade tips suitable for use in high bypass ratio, large civil aviation turbofan engines. Both the heat transfer to the blade tip and the over-tip leakage flow over the blade tip are characterised, as each has a profound influence on overall engine efficiency. The study is divided into two sections; in the first, computational simulations of a very large scale, low speed linear cascade with a flat blade tip were conducted. These simulations were validated against experimental d

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35

Davis, Steven. "Characterisation of nanocrystalline tin oxide sensor materials." Thesis, University of Kent, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.244334.

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36

Weglicki, Peter Stanislaw. "MOCVD of tin oxide for gas sensors." Thesis, University of Salford, 1990. http://usir.salford.ac.uk/26961/.

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Thin films of a wide variety of materials can be produced using an assortment of physical and chemical techniques. Such techniques are reviewed and compared, with particular reference to the deposition of tin oxide films. In the present study, MOCVD (Metal organic chemical vapour deposition) was used to grow thin films of tin oxide from dibutyltin diacetate precursor on a variety of substrates. A series of reactor prototypes were developed in accordance with specific requirements of reproducibility and process control. The evolution of the designs leading to the final working system is detaile

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37

Perry, Joshua L. "A Comparison of Gas Flow Resistane in Parker Flex-tip and Mallinckrodt RAE Nasal Endotracheal Tubes." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1380284347.

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38

Sheldon, Karl Edward. "Analysis Methods to Control Performance Variability and Costs in Turbine Engine Manufacturing." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/32290.

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Few aircraft engine manufacturers are able to consistently achieve high levels of performance reliability in newly manufactured engines. Much of the variation in performance reliability is due to the combined effect of tolerances of key engine components, including tip clearances of rotating components and flow areas in turbine nozzles. This research presents system analysis methods for determining the maximum possible tolerances of these key components that will allow a turbine engine to pass a number of specified performance constraints at a selected level of reliability. Through the co

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39

Ndzimandze, Samkeliso Sanele. "The synthesis and characterization of mixed-organic-cations tin halide perovskites for enhanced photovoltaic cell application." University of the Western Cape, 2018. http://hdl.handle.net/11394/6776.

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Magister Scientiae - MSc<br>In this research, novel hybrid perovskite materials were synthesized, characterized and applied in photovoltaic cells (PVCs) to enhance the performance of PVCs. Mixed-organic-cations tin halide perovskites (MOCTPs) were successfully synthesized using sol-gel method. These MOCTPs include guanidinium dimethylammonium tin iodide ([GA][(CH3)2NH2]SnI3) and guanidinium ethylmmonium tin iodide ([GA][CH3CH2NH3]SnI3). The MOCTPs were studied in comparison to their single-organic-cation tin perovskites (SOCTPs), which include guanidinium tin iodide (GASnI3), ethylammonium tin

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40

Watson, Thomas Francis. "Tin Oxide Cluster Assembled Films: Morphology and Gas Sensors." Thesis, University of Canterbury. Physics and Astronomy, 2009. http://hdl.handle.net/10092/3160.

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In this thesis, investigations into fabricating tin oxide hydrogen gas sensors from films assembled by the deposition of tin clusters are reported. The tin clusters were formed in a UHV compatible cluster apparatus by DC magnetron sputtering and inert gas aggregation. Through SEM imaging, it was found that the morphology of tin cluster assembled films deposited onto silicon nitride substrates was highly coalesced. The coalescence between the clusters was significantly reduced by reacting the clusters with nitrogen before they were deposited. This resulted in granular films with a grain size cl

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41

Ash, Peter William. "Studies of tin oxide gas sensors for gas chromatographic detection." Thesis, University of Plymouth, 1990. http://hdl.handle.net/10026.1/2066.

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Gas sensitive semiconductors have been known for many years and applied in static gas alarm systems for the monitoring of hazardous gases, however, their application has been limited by a lack of selectivity. In this work a semiconducting gas sensor has been configured for use as a gas chromatographic detector thus combining the sensitivity of semiconductor sensors with the selectivity of gas chromatography. The study has been confined to tin oxide devices, more specifically the Taguchi gas sensor (TGS) . The majority of this work has concentrated on the TGS 813 although the use of other TGS i

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42

Fältström, Love. "Graphite sheets and graphite gap pads used as thermal interface materials : A thermal and mechanical evaluation." Thesis, KTH, Tillämpad termodynamik och kylteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-147339.

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The electronic market is continually moving towards higher power densities. As a result, the demand on the cooling is increasing. Focus has to be put on the whole thermal management chain, from the component to be cooled to the ambient. Thermal interface materials are used to efficiently transfer heat between two mating surfaces or in some cases across larger gaps. There are several different thermal interface materials with various application areas, advantages and disadvantages. This study aimed to evaluate thermal and mechanical properties of graphite sheets and graphite gap pads. The work

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43

Zhang, Gong. "A study of tin oxide-based gas sensors with nanostructure." Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/19023.

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44

Willett, M. J. "Tin(IV) oxide gas sensors : Surface chemistry and electrical conductance effects." Thesis, University of Nottingham, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.380189.

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45

Díaz, Delgado Raül. "Tin Oxide Gas Sensors: An Electrochemical Approach." Doctoral thesis, Universitat de Barcelona, 2002. http://hdl.handle.net/10803/2743.

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En la actualidad existe una preocupación creciente en lo concerniente a los problemas medioambientales provocados por la actividad humana y en cómo estos problemas pueden afectar a nuestra salud. Uno de los problemas medioambientales más acuciantes es la creciente presencia de gases contaminantes en la atmósfera, y la investigación en este campo trata de determinar tanto las especies que son perjudiciales como las concentraciones a partir de las cuales son nocivas. Por lo que a este último punto se refiere, las legislaciones medioambientales son cada vez más restrictivas respecto a las concent

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46

Langenbrunner, Nisrene A. "Understanding the Responses of a Metal and a CMCTurbine Blade during a Controlled Rub Event using a Segmented Shroud." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1366191740.

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47

Arisi, Allan Nyairo. "Heat Transfer and Flow Characteristics on the Rotor Tip and Endwall Platform Regions in a Transonic Turbine Cascade." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/64501.

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This dissertation presents a detailed experimental and numerical analysis of the aerothermal characteristics of the turbine extremity regions i.e. the blade tip and endwall regions. The heat transfer and secondary flow characteristics were analyzed for different engine relevant configurations and exit Mach/Reynolds number conditions. The experiments were conducted in a linear blowdown cascade at transonic high turbulence conditions of Mexit ~ 0.85, 0.60 and 1.0, with an inlet turbulence intensity of 16% and 12% for the vane and blade cascade respectively. Transient infrared (IR) thermography t

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48

Kult, Ellen, and Antonia Berndtsson. "Den kulturella moderaten : En jämförande kvalitativ studie över tid." Thesis, Högskolan i Halmstad, Akademin för lärande, humaniora och samhälle, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-39827.

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The aim of this essay is examine how the Moderate party ideas and values have changed over time in relation to the so-called GAL-TAN dimension. The dimension theorizes values regarding green, alternative and libertarianism against traditional, authoritarian and nationalism. The dimension has recently become relevant for the Swedish political party system and political culture. The source material we use are documents of the Moderate party from 1904 to 2013. We have examine the Moderate party ideas using qualitative and comparative method, the results are presented in the form of a “codified te

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49

Ribeiro, Júlio César Bento. "Análise de técnicas para a soldagem TIG automatizada." Florianópolis, 2012. http://repositorio.ufsc.br/xmlui/handle/123456789/100701.

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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Mecânica<br>Made available in DSpace on 2013-06-25T21:46:47Z (GMT). No. of bitstreams: 1 311937.pdf: 5429259 bytes, checksum: fc88b81b788d2d066e47e239198cb67d (MD5)<br>A soldagem de raiz em tubos de parede espessa é de grande importância para vários segmentos da economia como as do petróleo e gás, naval e civil. A união de topo dos tubos é usualmente praticada de maneira manual, empregando o processo TIG DCEN e gás argônio, adicionando o arame pela frente do arco para o

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Riggs, Mark R. "TIG Welding of Nickel Titanium to 304 Stainless Steel." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1397607979.

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