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Showing 1 to 17 of 17 for “"Combustion Flame"”.
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Unsteady surface heat flux and temperature measurements
… heat flux and temperature from a turbulent combustion flame impinging on a surface. Using the analytical semi-infinite conduction model, the unsteady surface heat flux was calculated from the transient temperature measurements and the surface temperature was calculated from the unsteady …
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Application of Joint Time-Frequency Methods and Artificial Neural Networks for Monitoring Co-Firing Burners
… need to efficiently burn the fuel, ensure stable combustion and result in the lowest emissions. However, recent requirements to reduce CO2 emissions from coal-red boiler plant as part of the drive to<br/>reduce the carbon footprint of energy suppliers has focussed on the co-ring of biomass, …
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Dynamics, stability and scaling of turbulent methane oxy-combustion
… for reducing CO₂ emissions, with oxy-fuel combustion being one of the most promising technologies because of it is high efficiency and low cost. In oxy-combustion, CH₄/O₂/CO₂ mixtures burn at low temperatures (~~1700 K), high pressures (~~40 bar), where laminar burning velocities are about …
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On Combustion: Contemporary British Poetry and the Pyrocene (1990-2017)
… in order to examine the defining roles of combustion, flame, and fire across a range of contemporary works of experimental British poetry in the period 1990-2017 (particularly those arising from the so-called ‘Cambridge School’). It argues that this body of texts proves exceptionally …
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Development and experimental analysis of a micro-flame ionization detector for portable gas chromatographs
… has been developed that utilized a diffusion flame encased in a micro-fabricated SOI structure. The micro-flame was fueled by a portable electrolyzer that provided the hydrogen and oxygen flow rates necessary for the device operation. The micro-FID was able to detect organic analytes with …
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A study on the flow characteristics of an industrial radiant tube burner
… validated modelling study of the flow of combustion air in an industrial radiant tube burner (RTB). The RTB is used typically in industrial heat treating furnaces. The work has been initiated because of the need for improvements in burner lifetime and performance which are related to the …
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A computational approach to flame hole dynamics
Item withdrawn by Laura Spradlin (lspradl2@illinois.edu) on 2014-11-17T14:56:13Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 Knaus_Robert.pdf: 7760656 bytes, checksum: 67aada40f0e45c8caa3b9727f9dcf37f (MD5)
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Numerical investigation of effects of pressure and chemistry on characteristics of turbulent premixed flames
Turbulent premixed flames are used in many energy conversion and propulsion devices. The efficiency and performance of these devices are affected by operating conditions, which also affect the highly nonlinear turbulence-chemistry interactions (TCIs). Previous fundamental studies characterize TCIs …
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Laminar flame propagation in mixtures with compositional stratification at small length scales
The behavior and structure of laminar hydrocarbon flames which propagate parallel to the direction of a periodic gradient of mixture composition was studied both experimentally, using a specially designed burner, and computationally, using a planar numerical model. The variations in local mixture …
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The Role of Fuel Droplets in Laminar Flame Propagation
In all likelihood, combustion will be needed in the foreseeable future to supply energy to a growing population. Yet the burning of fossil fuels to power modern life is both harmful and unsustainable. Faced with this dilemma, the design of clean and efficient combustion systems is a global …
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Isosurface Interactions Within Turbulent Premixed Hydrogen and Hydrocarbon Flames
… isosurface interactions in premixed turbulent flames. These interactions for a suitable isosuface corresponding to the reaction zone can be interpreted as flame-flame interactions. Isosurface interactions can be identified with the help of Morse theory of critical points and the local topology …
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Analysis of nitrogen oxide emissions produced during combustion of cracked-ammonia fuels
… utilization of hydrogen through ammonia-hydrogen combustion. Pure ammonia is difficult to ignite and burn. In contrast, pure hydrogen is extremely flammable and difficult to control. However, ammonia-hydrogen blends have proven to burn efficiently in a myriad of combustion-based power generation …
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Ignition and propagation mechanisms of spray flames
… decrease minimum ignition energies and enhance flame speeds. In this study, a comprehensive analysis of the phases of ignition in sprays is carried out in a controlled, well-characterised experiment: the initiation of a spherically expanding flame in a turbulent droplet-laden jet by a laser …
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Numerical Modelling of LOX Droplet Combustion in Hydrogen under Micro-gravity Conditions
… only water vapor as an exhaust. This makes LOX combustion research critical for improving combustion efficiency and avoiding flame instabilities in the rocket engine’s combustion chamber. The spray dispersion method is used to inject liquid oxygen into the combustion chamber, whereas hydrogen …