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Relevant bibliographies by topics / Propeler turbine / Dissertations / Theses

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Dissertations / Theses on the topic 'Propeler turbine'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Duda, Petr. "Optimalizace polohy propelerové turbíny v kašně." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231499.

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The thesis contains basic information about propeler turbines. It deals with the correct location in the fountain so as to ensure the highest possible performance. Part of the work is devoted to the all-weather resulting blade to blade channels and their impact on the room is filled with diffuser.

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2

Skidmore, F. W., and n/a. "The influence of gas turbine combustor fluid mechanics on smoke emissions." Swinburne University of Technology, 1988. http://adt.lib.swin.edu.au./public/adt-VSWT20070420.131227.

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This thesis describes an experimental program covering the development of certain simple combustion chamber modifications to alleviate smoke emissions from the Allison T56 turboprop engines operated by the Royal Australian Air Force. The work includes a literature survey, smoke emission tests on two variants of the T56 engine, flow visualisation studies of the combustion system in a water tunnel and combustion rig tests of a standard combustor and four possible modifications. The rig tests showed that reductions in smoke emissions of 80% were possible by simple modifications that reduced the

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3

Faulkner, Simon A. "A simplified low head propeller turbine for micro hydroelectric power." Thesis, University of Canterbury. Engineering, 1991. http://hdl.handle.net/10092/6456.

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This thesis describes the development of a simplified propeller turbine unit to produce power in a low head micro hydroelectric power installation. To be appropriate for remote areas and developing countries, a micro hydro system needs to be simple in design. There are good turbine designs for medium to high heads but traditional designs for heads under about 10m, ie, the crossflow turbine and waterwheel, are slow running, requiring substantial speed increase to drive an AC generator. Propeller turbines have a higher running speed but are normally too complicated for micro hydro installations

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4

Demetriades, Georgios Manoli. "Integral propeller turbine-induction generator units for village hydroelectric schemes." Thesis, Nottingham Trent University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363325.

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5

Fuller, Adam Michael. "Increasing the specific speed of simple microhydro propeller turbines." Thesis, University of Canterbury. Mechanical Engineering, 2011. http://hdl.handle.net/10092/6680.

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The late University of Canterbury civil engineering lecturer Peter Giddens developed a range of simple microhydro turbines, with publications from as early as the 1980s. He considered that a range of simple but well-designed turbines which covered the gamut of possible small sites would be more useful than any single turbine. He started with radial inflow turbines, then set about extending their range of applicability by increasing specific speed. That extension was continued by the research in this thesis, which aimed to produce a design with a minimum efficiency of 70 % at a specific speed o

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6

Gagnon, Jean-Mathieu. "Contribution to the study of the 3D unsteady flow in a propeller turbine." Thesis, Université Laval, 2012. http://www.theses.ulaval.ca/2012/28126/28126.pdf.

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7

Portocarrero, Aguilar Carlos Enrique. "Diseño de una turbina propeller utilizando plásticos reciclados reforzados con madera recuperada." Bachelor's thesis, Pontificia Universidad Católica del Perú, 2012. http://tesis.pucp.edu.pe/repositorio/handle/123456789/1215.

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El tema del calentamiento global es un gran debate entre políticos, científicos, la industria y la sociedad en general. Se discute desde su existencia hasta su severidad, sus potenciales causas, así como sus efectos en los sistemas globales tales como el clima, la ecología y particularmente en la vida de las personas. En este contexto, es indiscutible que las emisiones de dióxido de carbono y otras que intensifican el efecto invernadero han aumentado dramáticamente, a la par de nuestro consumo energético. Para revertir esta situación, por un lado, es impostergable el desarrollo de tecnologías

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8

Houde, Sébastien. "Analysis of the part-load and speed-no-load flow dynamics in a model propeller hydraulic turbine." Doctoral thesis, Université Laval, 2018. http://hdl.handle.net/20.500.11794/29823.

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Les turbines hydrauliques sont devenues un atout important pour la régulation de la puissance sur les réseaux électriques. Cependant, les scénarios de régulation de puissance exigent que les turbines fonctionnent loin de leurs points d'opération optimale, dans des régions où de grandes uctuations de pression peuvent affecter l'intégrité structurale de la turbine. Cette thèse présente des contributions a l'etude de l'hydrodynamique de l'écoulement dans une turbine helice modele fonctionnant dans des conditions de charge partielle et de vitesse-sans-charge. À charge partielle, les fluctuations

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9

Leng, Yujun. "Preliminary design tools in turbomachinery| Non-uniformly spaced blade rows, multistage interaction, unsteady radial waves, and propeller horizontal-axis turbine optimization." Thesis, Purdue University, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10149746.

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<p>Turbomachinery flow fields are inherently unsteady and complex which makes the related CFD analyses computationally intensive. Physically based preliminary design tools are desirable for parametric studies early in the design stage, and to provide deep physical insight and a good starting point for the later CFD analyses. Four analytical/semi-analytical models are developed in this study: 1) a generalized flat plate cascade model for investigating the unsteady aerodynamics of a blade row with non-uniformly spaced blades; 2) a multistage interaction model for investigating rotor-stator inter

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10

Fjällman, Johan. "Large Eddy Simulations of Complex Flows in IC-Engine's Exhaust Manifold and Turbine." Doctoral thesis, KTH, Strömningsfysik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-151399.

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The thesis deals with the flow in pipe bends and radial turbines geometries that are commonly found in an Internal Combustion Engine (ICE). The development phase of internal combustion engines relies more and more on simulations as an important complement to experiments. This is partly because of the reduction in development cost and the shortening of the development time. This is one of the reasons for the need of more accurate and predictive simulations. By using more complex computational methods the accuracy and predictive capabilities are increased. The disadvantage of using more sophisti

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11

Ragnarsson, Tobias. "Reglerbara skovlar på pumphjul." Thesis, Linköping University, Department of Mechanical Engineering, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-5633.

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<p>The thesis investigates if it is possible to replace several pumpimpellers with one controllable pumpimpeller, with a economical and a manufacturing analisys aspect. The studied pumpimpeller is mounted on a midrange wastewaterpump, N3127MT.</p><p>In the thesis a contemplated manufacturing process is evaluated for a concept that are supposed to act as a controllable pumpimpeller. The pumpimpeller are studied in a manufacturing and flow matter and are presented in the thesis.</p><p>The manufacturing cost is also estimated, and this has been compared to the storage cost and other costs that th

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12

Reviol, Thomas [Verfasser]. "A design process for propellers for the agitation of high viscous fluids based on the design analysis of wind turbine blades / Thomas Reviol." Düren : Shaker, 2021. http://nbn-resolving.de/urn:nbn:de:101:1-2021100305211998726893.

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13

Rupp, Jochen. "Acoustic absorption and the unsteady flow associated with circular apertures in a gas turbine environment." Thesis, Loughborough University, 2013. https://dspace.lboro.ac.uk/2134/12984.

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This work is concerned with the fluid dynamic processes and the associated loss of acoustic energy produced by circular apertures within noise absorbing perforated walls. Although applicable to a wide range of engineering applications particular emphasis in this work is placed on the use of such features within a gas turbine combustion system. The primary aim for noise absorbers in gas turbine combustion systems is the elimination of thermo-acoustic instabilities, which are characterised by rapidly rising pressure amplitudes which are potentially damaging to the combustion system components. B

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14

Reviol, Thomas [Verfasser], and Martin [Akademischer Betreuer] Böhle. "A design process for propellers for the agitation of high viscous fluids based on the design analysis of wind turbine blades / Thomas Reviol ; Betreuer: Martin Böhle." Kaiserslautern : Technische Universität Kaiserslautern, 2021. http://d-nb.info/1238595782/34.

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15

Robinson, Mark D. "Unsteady inlet condition generation for Large Eddy Simulation CFD using particle image velocimetry." Thesis, Loughborough University, 2009. https://dspace.lboro.ac.uk/2134/15003.

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In many areas of aerodynamics the technique of Large Eddy Simulation (LES) has proved a practical way of modelling the unsteady phenomena in numerical simulations. Few applications are as dependent on such an approach as the prediction of flow within a gas turbine combustor. Like any form of Computational Fluid Dynamics (CFD), LES requires specification of the velocity field at the inflow boundary, with much evidence suggesting the specification of inlet turbulence can be critical to the resultant accuracy of the prediction. While a database of time-resolved velocity data may be obtained from

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16

Sovják, Richard. "Design samochodného postřikovače." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231421.

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The main aim of this master's thesis is innovative approach to design of self propelled sprayer with technical, esthetic, ergonomic and economic demands. The final design with it's modern and functional look should be an attractive element of agrotechnics. Another aim is also to fulfill social and psychological functions and address the public about protection of cultivated crops with emphasis on alternative energy and other uses of agricultural machinery.

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17

Belmar, Gil Mario. "Computational study on the non-reacting flow in Lean Direct Injection gas turbine combustors through Eulerian-Lagrangian Large-Eddy Simulations." Doctoral thesis, Universitat Politècnica de València, 2021. http://hdl.handle.net/10251/159882.

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[ES] El principal desafío en los motores turbina de gas empleados en aviación reside en aumentar la eficiencia del ciclo termodinámico manteniendo las emisiones contaminantes por debajo de las rigurosas restricciones. Ésto ha conllevado la necesidad de diseñar nuevas estrategias de inyección/combustión que operan en puntos de operación peligrosos por su cercanía al límite inferior de apagado de llama. En este contexto, el concepto Lean Direct Injection (LDI) ha emergido como una tecnología prometedora a la hora de reducir los óxidos de nitrógeno (NOx) emitidos por las plantas propulsoras de lo

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18

Menéndez, Arán David Hernán. "Hydrodynamic optimization and design of marine current turbines and propellers." 2013. http://hdl.handle.net/2152/21497.

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This thesis addresses the optimization and design of turbine and propeller blades through the use of a lifting line model. An existing turbine optimization methodology has been modified to include viscous terms, non-linear terms, and a hub model. The method is also adapted to the optimization of propellers. Two types of trailing wake geometries are considered: one based on helical wakes which are aligned at the blade (using the so-called "moderately loaded propeller'' assumption), and a second one based on a full wake alignment model in order to represent more accurately the wake geometry and

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19

Jian, Xiu-Ting, and 簡秀庭. "Applying the Blade Element Momentum Theory to the Computations of Propeller and Current Turbine Forces." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/78832884295591128259.

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碩士<br>國立臺灣海洋大學<br>系統工程暨造船學系<br>104<br>It is time consuming and complicated to simulate the propeller and current turbine performances by viscous flow RANS method. The objective of this thesis is to develop an efficient and applicable method for the computations of propeller and current turbine performance, and later can be extended to the cases of large angles of attack. The blade element momentum theory (BEMT) is selected as the method in this thesis. The BEMT has been developed for some time, and it is widely used to the evaluation of wind turbine performance. The BEMT is seldom used in eval

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20

Xu, Wei 1986. "Numerical techniques for the design and prediction of performance of marine turbines and propellers." Thesis, 2010. http://hdl.handle.net/2152/ETD-UT-2010-08-2020.

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The performance of a horizontal axis marine current turbine is predicted by three numerical methods, vortex lattice method MPUF-3A, boundary element method PROPCAV and a commercial RANS solver FLUENT. The predictions are compared with the experimental measurements for the same turbine model. A fully unsteady wake alignment is utilized in order to model the realistic wake geometry of the turbine. A lifting line theory based method is developed to produce the optimum circulation distribution for turbines and propellers and a lifting line theory based database searching method is used to achieve

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21

Gully, Benjamin Houston. "Hybrid powertrain performance analysis for naval and commercial ocean-going vessels." Thesis, 2012. http://hdl.handle.net/2152/ETD-UT-2012-08-6270.

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The need for a reduced dependence on fossil fuels is motivated by a wide range of factors: from increasing fuel costs, to national security implications of supply, to rising concern for environmental impact. Although much focus is given to terrestrial systems, over 90% of the world's freight is transported by ship. Likewise, naval warfighting systems are critical in supporting U.S. national interests abroad. Yet the vast majority of these vessels rely on fossil fuels for operation. The results of this thesis illustrate a common theme that hybrid mechanical-electrical marine propulsion systems

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