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 9 of 9 for “"Flameholding"”.
-
Flameholding methods for compact hypersonic systems
Methods of flameholding enhancement for ethylene-fueled compact hypersonic systems were characterized using high-speed pressure measurements and imaging in the high-enthalpy supersonic facility ACT-II. “Hypermixer” geometries consisting of tapered wedges with and without expansion-ramp vortex …
-
Uncooled choked plasma torch for ignition and flameholding in supersonic combustion
An 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 …
-
Ignition and flameholding in supersonic flow by injection of dissociated hydrogen
… the use of free radicals for ignition and flameholding in supersonic flows. An analytical investigation of the effects of adding small quantities of radicals to a stoichiometric mixture of hydrogen and air was performed using a finite-rate chemical kinetics code. The results of these …
-
Supersonic Combustion of Solid Fuels
… Results reveal that a longer and larger flameholding cavity creates favorable conditions for ignition and sustained combustion. The inlet temperature is also systematically varied to extend the available literature on the supersonic combustion of solid fuels to lower temperature operating …
-
Plasma Torch Atomizer-Igniter for Supersonic Combustion of Liquid Hydrocarbon Fuels
… atomization, penetration, mixing, ignition and flameholding is desired. An original design concept incorporating these capabilities was built and tested at Virginia Tech, and was found to provide good penetration, effective atomization, and robust ignition and flameholding. Quiescent testing …
-
Experimental investigation of the flow field in a missile launch tube
… support assembly volume. However, strong flameholding zones are established in the region vacated by the accelerating missile, where it is believed that secondary combustion could occur. The flow field characterization has shown that considerable improvements to system performance should …
-
A Study of Plasma Ignition Enhancement for Aeroramp Injectors in Supersonic Combustion Applications
… with the hope of producing superior mixing and flameholding performance for supersonic combustion applications. To create a knowledge base for integration, several key investigations were made of the anode material, anode geometry, and spectrographic analysis of different light hydrocarbon fuels …
-
Development of high-speed laser diagnostics for the study of advanced propulsion systems
… 2 combustor to characterize the behavior of the flameholding cavity. The effects of cavity fueling rate are explored and discussed. High-shear turbulent combustors produce convoluted reaction zones, and approach the boundaries between theoretical combustion regimes. Visualization of CH radicals …
-
A combined cycle approach to dual-mode scramjet design and analysis
… rapid expansion of the original flowpath at the flameholding station of the combustor and resulting decrease in pressure was identified as the primary source of loss of performance. Flow choking studies were performed in both axisymmetric and rectangular scramjet flowpaths, revealing notable …