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.
Results
Showing 1 to 20 of 23 for “"plasma torch"”.
-
Plasma Torch Atomizer-Igniter for Supersonic Combustion of Liquid Hydrocarbon Fuels
… quiescent 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. …
-
Uncooled choked plasma torch for ignition and flameholding in supersonic combustion
… experimental 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, …
-
Operation of a High-Pressure Uncooled Plasma Torch with Hydrocarbon Feedstocks
… main scope 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 …
-
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.
-
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 …
-
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 …
-
Performance of a Plasma Torch with Hydrocarbon Feedstocks for Use in Scramjet Combustion
… at 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 …
-
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 …
-
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 …
-
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.
-
An Integrated Aerodynamic-Ramp-Injector/ Plasma-Torch-Igniter for Supersonic Combustion Applications with Hydrocarbon Fuels
… integrated, 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 …
-
Operation Characteristics of a Plasma Torch for Supersonic Combustion Applications with Simulated Cracked JP-7 Feedstock
Research 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. …
-
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 …
-
Study of radio frequency inductively coupled thermal plasma torch (RF ICPT) for radioactive waste treatment: thermoplastics - polyethylene and polyvinyl chloride (PVC)
… presented by such plastic RW, a thermal plasma waste treatment approach was considered. A radiofrequency (RF) inductively coupled plasma torch (ICPT) was designed in SOLIDWORKS and simulated using COMSOL Multiphysics software, and its thermal behavior was studied. Its applicability …
-
Development and Testing of an Integrated Liquid-Fuel-Injector/Plasma-Igniter for Scramjets
… liquid fuel (kerosene) aeroramp injector/plasma igniter was tested in cold flow using the Virginia Tech supersonic wind tunnel at Mach 2.4. The liquid fuel (kerosene) injector is flush wall mounted and consists of a 2 hole aeroramp array of impinging jets that are oriented in a manner to …
-
Ignition and flameholding in supersonic flow by injection of dissociated hydrogen
… experiment using hydrogen atoms generated by a plasma torch. The supersonic combustion tests were conducted in a direct-connect mode at atmospheric pressure with either ambient temperature air or burner-heated vitiated air with total temperatures from 1200 to 4000 R. Both semi-freejet and ducted …
-
A Study of Plasma Ignition Enhancement for Aeroramp Injectors in Supersonic Combustion Applications
… with the integration of a low-power, uncooled plasma torch into a fuel injector array. The potential application was for an integrated scramjet igniter/injector, with the hope of producing superior mixing and flameholding performance for supersonic combustion applications. To create a knowledge …
-
Nanoscale Carbon Architectures for Electrode Applications
… a variety of carbonaceous nanomaterials using plasma torch and furnace-based expansion-reduction techniques. The second objective was to correlate the unique characteristics of these materials to their electrical properties when assembled into electrochemical double-layered capacitors (EDLCs), …
-
Revestimentos a base de Ta/Al2O3 produzidos por aspersão térmica sobre substrato metálico
Metal substrates were coated by thermal spraying plasma torch, they were positioned at a distance of 4 and 5 cm from the nozzle exit of the plasma jet. The starting materials were used for deposition of tantalum oxide powder and aluminium. These two materials were mixed and ground into high-energy …
-
Deposition of yttria-stabilized zirconia thermal barrier coatings by laser-assisted plasma coating at atmospheric pressure
… generation system, and a coaxial cylindrical plasma torch, where an atmospheric-pressure plasma (APP) can be generated using 2.45 GHz. The discharge characteristics of the atmospheric plasma, such as electron temperature Te, electron density ne, and plasma gas temperature Tg, are …
Page 1 of 2