Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 81 for “"torch"”.
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Kebahagiaan sejati wanita penderita TORCH (Toxo, Rubella, CMV, Herpess)
… Kebahagian dapat dirasakan oleh wanita penderita TORCH. Wanita penderita TORCH dapat memperoleh kebahagiaan dari berbagai factor. Hal tersebut berbanding terbalik dengan kenyataan bahwa wanita penderita TORCH mengalami banyak cobaan dalam hidupnya. Cobaan-cobaan tersebut seperti mengalami …
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BRICS Currency and Dollar Hegemony: Passing of the Torch?
<p>The dawn of the 21st century has brought with it tremendous uncertainty with regard to the nature of global dominance. As doubts concerning the United States’ viability as a hegemon emerge, questions about how new powers may come to prominence circle (Rapayane, 2020). The BRICS bloc -- …
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Carrying the torch: Five faculty members’ experiences as champions of assessment
This phenomenological study examined the lived experience of community college faculty champions of learning outcomes assessment. This study sought to elucidate the experiences of faculty champions of assessment by exploring both what the participants experienced as well as how they experienced …
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Plasma Torch Atomizer-Igniter for Supersonic Combustion of Liquid Hydrocarbon Fuels
… environment, the regeneratively cooled plasma torch igniter was found to significantly increase electrode life while heating, atomizing, and igniting the liquid fuel. Jet breakup length was measured and characterized, and mean droplet size was estimated using an existing correlation. Several …
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Uncooled choked plasma torch for ignition and flameholding in supersonic combustion
… investigation on an uncooled choked plasma torch using hydrogen/argon mixtures as a propellant was conducted. This low-power plasma torch was designed to be used as an ignitor and flameholder in supersonic combustion. The anode and cathode were made of two-percent thoriated tungsten, and no …
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Operation of a High-Pressure Uncooled Plasma Torch with Hydrocarbon Feedstocks
… of this project was to determine if a plasma torch could operate on pure hydrocarbon feedstocks and, if so, to catalogue the torch operational characteristics. The future goal of the project is to design a plasma torch for supersonic combustion applications that operates off of the vehicle …
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Modeling the non-transferred arc plasma torch and plume for plasma processing
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1992.
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Evaluation of a Strut-Plasma Torch Combination as a Supersonic Igniter-Flameholder
… combustion. The current work examines a plasma torch-strut combination as an igniter-flameholder. The plasma torch-strut combination was tested in the Virginia Tech unheated supersonic wind tunnel at Mach 2.4. Pressure and temperature sampling, filtered photography, and spectroscopic …
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An Investigation of Controlled Oscillations in a Plasma Torch for Combustion Enhancement
The oscillating plasma torch is proposed as a potential device that will produce an oscillating shock and resulting control of the supersonic combustion process. This research will capitalize on previous results [Gallimore, 1998] which indicate that the plasma torch oscillations originate from the …
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Performance of a Plasma Torch with Hydrocarbon Feedstocks for Use in Scramjet Combustion
… Virginia Tech on a high-pressure uncooled plasma torch to study torch operational characteristics with hydrocarbon feedstocks and to determine the feasibility of using the torch as an igniter in scramjet applications. Operational characteristics studied included electrical properties, such as arc …
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Fibre Modification for Concrete Reinforcement using a Novel Atmospheric Microwave Induced Plasma Torch (MIPT)
… the design of a novel microwave induced plasma torch for the surface modification of non-corrosive fibres. The system was developed to reduce the equipment cost, and production time needed in the conventional plasma treatment. To generate a consistent and low-cost microwave plasma jet at …
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The development and operating characteristics of an improved plasma torch for supersonic combustion applications
The design of the VPI plasma torch, which has been used as an ignitor and flameholder in supersonic combustion studies, has been modified in order to decrease the electrode wear and to increase stability. The plasma torch can be used as a source of hydrogen or nitrogen radicals which initiate and …
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Establishing isokinetic flow for a plasma torch exhaust gas diagnostic for a plasma hearth furnace
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1996, and Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1996.
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An Integrated Aerodynamic-Ramp-Injector/ Plasma-Torch-Igniter for Supersonic Combustion Applications with Hydrocarbon Fuels
… flush-wall, aero-ramp-fuel-injector/plasma-torch igniter and flame propagation system for supersonic combustion applications with hydrocarbon fuels was developed and tested. The main goal of this project was to develop a device which could be used to demonstrate that the correct placement of …
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Operation Characteristics of a Plasma Torch for Supersonic Combustion Applications with Simulated Cracked JP-7 Feedstock
… conducted at Virginia Tech has examined plasma torch operational characteristics using a feedstock gas of mixed hydrocarbons representing a cracked JP-7 surrogate. The tests were part of a program to examine the torch as an igniter and flame-holder for hydrocarbon-fueled scramjet engines. …
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Scramjet Operability Range Studies of an Integrated Aerodynamic-Ramp-Injector/Plasma-Torch Igniter with Hydrogen and Hydrocarbon Fuels
An integrated aerodynamic-ramp-injector/plasma-torch-igniter of original design was tested in a Mâ = 2, unvitiated, heated flow facility arranged as a diverging duct scramjet combustor. The facility operated at a total temperature of 1000 K and total pressure of 330 kPa. Hydrogen (H2), ethylene …
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Sacred Flame: 100 Years Later Still Bringing Communities Together
The Olympic torch relay, as the essential bond between the ancient and the modern Olympic Games and the symbol of Olympism, serves as the prelude to the Olympic Games and conveys a message of peace, goodwill and friendship along its route. Even though the torch relay is one of the most essential …
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