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Dissertations / Theses on the topic 'Vortex devices'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Duwel, Amy E. (Amy Elizabeth). "Underdamped vortex flow devices." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/36576.

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2

Lee, Evan J. (Evan Joseph). "Airfoil Vortex Induced Vibration suppression devices." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/39874.

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Thesis (S.M. in Naval Architecture and Marine Engineering; and, S.M. in Ocean Systems Management)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, June 2007.<br>"May 2007."<br>Includes bibliographical references (p. 51).<br>Vortex Induced Vibrations (VIV) is a major concern of the offshore oil industry. This problem leads to fatigue failure in the marine risers and causes costly replacement of the risers. Appendages such as helical strakes have proven that VIV can be eliminated but at the cost of increased drag. Increased drag reduces the time that the riser can operate

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3

Qiu, Yuan J. "A study of streamwise vortex enhanced mixing in lobed mixer devices." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/37175.

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4

Артюхов, Артем Євгенович, Артем Евгеньевич Артюхов, and Artem Yevhenovych Artiukhov. "The prospects of granules getting with the specific properties in small-sized vortex devices." Thesis, Государственный институт подготовки и переподготовки кадров промышленности, 2011. http://essuir.sumdu.edu.ua/handle/123456789/26420.

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Найбільш простою у виробництві і застосуванні вибуховою речовиною є пориста аміачна селітра (ПАС). ПАС також є основою для виробництва інших вибухових речовин. Метою роботи є обґрунтування можливості створення в Україні сучасного високоефективного і економічного виробництва ПАС, яке в даний час відсутня. В результаті порівняльного аналізу споживчих властивостей отриманого безбаштовим способом продукту з російським аналогом показано, що утримуюча здатність ПАС по соляровій оливі коливається в межах 9-17% при міцності гранул до 500 гр/гранулу, а утримуюча здатність російського аналога - 6,8% при

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5

Saad, Mohamed S. "Performance and capacity of centrifugal gas cleaning devices." Access electronically, 2006. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20070815.164233/index.html.

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6

McMullin, Nathan K. "Numerical simulation of plasma-based actuator vortex control of a turbulent cylinder wake /." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1558.pdf.

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7

McIlhenny, Julia F. "Artificial turbulent bursts." Link to electronic thesis, 2002. http://www.wpi.edu/Pubs/ETD/Available/etd-0110102-201212.

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8

Галіч, Роман Васильович. "Вплив вихідних пристроїв на гідродинаміку і ефективність вихрових пиловловлювачів". Thesis, Сумський державний університет, 2014. http://essuir.sumdu.edu.ua/handle/123456789/36853.

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Дисертація присвячена вивченню гідродинаміки процесу виділення пилу у вихрових апаратах із зустрічними закрученими потоками (ВАЗЗПЦ) з циліндричною сепараційною камерою, призначених для очищення аерозолів в хімічній, будівельній, металургійній та інших галузях промисловості. Вивчено гідродинамічні особливості моделі ВАЗЗПЦ. Визначено характер впливу режимно-конструктивних параметрів вихідного патрубка та бункерної частини конструкції апарата на гідродинаміку, ефективність роботи та енергоекономічність. Виходячи з закону збереження моменту кількості руху отримані аналітичні вирази з розрахунку

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9

Harris, Christopher A. "Acoustics and Fluid Dynamics Studies of High Speed Jet Noise Reduction Devices." University of Cincinnati / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1218687698.

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10

Rask, Olaf Haller. "The Reduction of Mixing Noise and Shock Associated Noise using Chevrons and other Mixing Enhancement Devices." University of Cincinnati / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1223056142.

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11

Bruder, Brittany Lynn. "Assessment of hydrokinetic renewable energy devices and tidal energy potential at Rose Dhu Island, GA." Thesis, Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41198.

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Current hydro-turbines aim to capture the immense energy available in tidal movements, however commonly applied technologies rely on principles more applicable in hydroelectric dams. Tidal stream currents, such as in Coastal Georgia, are not strong enough to make such turbines both efficient and economically viable. This research proposes a novel low-energy vortex shedding vertical axis turbine (VOSTURB) to combat the inefficiencies and challenges of hydro-turbines in low velocity free tidal streams. Some of the energy in tidal streams is extracted naturally from vortex shedding; as wate

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12

Alameer, Maryam. "Polarization Dependent Ablation of Diamond with Gaussian and Orbital Angular Momentum Laser Beams." Thesis, Université d'Ottawa / University of Ottawa, 2019. http://hdl.handle.net/10393/39850.

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The vectorial nature (polarization) of light plays a significant role in light-matter interaction that leads to a variety of optical devices. The polarization property of light has been exploited in imaging, metrology, data storage, optical communication and also extended to biological studies. Most of the past studies fully explored and dealt with the conventional polarization state of light that has spatially symmetric electrical field geometry such as linear and circular polarization. Recently, researchers have been attracted to light whose electric field vector varies in space, the s

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13

Dicaire, Marie-Claude. "Generation of Vortex Beam Superpositions Using Angular Gratings." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/35999.

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Beams of light carrying orbital angular momentum, such as vortex beams, have many applications in imaging and micromanipulation. We focus on applications in communication, in particular for quantum key distribution, where the security of communication channels is enhanced with the laws of quantum mechanics. However, this procedure requires superpositions of vortex beams. We want to generate such beams using integrated optics components due to their small size and their advantages in scalability and stability. Angular gratings, which are ring resonators with an embedded Bragg grating, are inte

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14

Burger, Anja. "Introductory investigation of the Ranque-Hilsch vortex tube as a particle separation device for the PBMR." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/4201.

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Thesis (MScEng (Mechanical and Mechatronic Engineering))--University of Stellenbosch, 2010.<br>ENGLISH ABSTRACT: The Pebble Bed Modular Reactor (PBMR) is a Generation IV graphite-moderated helium cooled nuclear reactor which is being developed in South Africa. The PBMR design is based on the German Arbeitsgemeinschaft Versuchreaktor (AVR). The AVR was decommissioned in December 1988 due to operational and safety problems. The PBMR project has put a lot of emphasis on safety and therefore all safety issues relating to the AVR have to be addressed before this technology can be implemented.

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15

Igder, Aghil. "Application of the Vortex Fluid Device (VFD) in Polysulfone Synthesis and Ultra-filtration Membrane Fabrication for water treatment purposes." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2021. https://ro.ecu.edu.au/theses/2433.

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Extensive studies have been performed to improve key properties of filtration membranes via controlling the fabrication process conditions as well as physical and/or chemical modification of the polymers used in membrane fabrication. The Vortex Fluid Device (VFD) is a newly invented platform which has found many applications in materials science and clean technology. The unique features of the VFD originate from a combination of different effects (e.g., micro-mixing, viscous drag, microfluidic flow, enhanced mass transfer) all resulting in faster, greener, and more efficient and better control

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16

Ertugrul, Suat Erdem. "The Effects Of Geometric Design Parameters On The Flow Behavior Of A Dual Pulse Solid Rocket Motor During Secondary Firing." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12615184/index.pdf.

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The ability of a propulsion system is very crucial for the capability of a missile or a rocket system. Unlike liquid propellant rocket motors, the only control mechanism of the thrust value is the propellant geometry in solid propellant rocket motors. When the operation of solid propellant rocket motor has started, it cannot be stopped anymore. For this main reason the advance of dual pulse motor technology has started. The aim of this study is to investigate the geometrical effects of design parameters on the flow behavior of a dual pulse solid propellant rocket motor by using commercial Comp

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17

Heffernan, Kenneth G. "Trailing vortex attenuation devices." Thesis, 1985. http://hdl.handle.net/10945/21590.

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18

Sahu, Sudhir Kumar. "A cavity electromechanical device for superconducting vortex charge sensing." Thesis, 2022. https://etd.iisc.ac.in/handle/2005/5736.

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The penetration of magnetic fields in the form of quantized vortices in type-II superconductors is well known. However, it is not well known that such vortices can be electrically charged. The effect is quite subtle and originates from the particle-hole symmetry in a superconductor. The high Tc superconductors (HTS) are predicted to be better candidates for vortex-charge detection due to their large superconducting gap. Thus far, a direct measurement of charged cores has remained challenging due to their small value and electrostatic screening by the surrounding opposite charges. I

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19

Perez, Jean Carlos. "Theory and simulation of sheared flows and drift waves in the large plasma device and the helimak." Thesis, 2006. http://hdl.handle.net/2152/2609.

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20

Wang, Po-kai, and 王柏凱. "Design and experimental study of horizontal non-contact vacuum suction device and vortex type vacuum generator." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/99101581555105595821.

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碩士<br>國立雲林科技大學<br>機械工程系碩士班<br>99<br>This paper discusses the applications of novel non-contact vacuum pad to different real industries. The basic operating principle of the vacuum pad is the “Vortex Levitation Theory” that generates the effect of vacuum. Based on the non-contact vacuum suction device, this paper discusses the horizontal suction in static and dynamic environment. Two different controller, i.e. PID and Fuzzy Controller, are utilized to control precisely the air gap. In the future, such a suction pad may find some potential application fields, like the pick-up and transportation

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21

Krishnaraj, K. P. "Flow and structure of dense granular materials." Thesis, 2019. https://etd.iisc.ac.in/handle/2005/5060.

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Granular materials are frequently encountered in our daily lives and are widely processed forms of matter in various industries. Despite decades of research, the mechanical behavior of granular materials is not well understood. This thesis focuses on two problems in granular materials, flow in a cylindrical Couette geometry, and emergence of the force network. Recent experiments on granular materials sheared in a cylindrical Couette device revealed a puzzling anomaly, wherein all components of the stress rise nearly exponentially with depth. In this thesis, using particle dynamics simula

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