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Showing 1 to 7 of 7 for “"Partially premixed flames"”.
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Hydrogen Enrichment Effects on Thermoacoustics of Turbulent Partially Premixed Flames
… using Large Eddy Simulations (LES) for a partially premixed swirl stabilised methane-air flame in a GTMC. Simulations are also performed for cases with methane-hydrogen blends revealing a similar bimodal instability, where the frequency of thermo acoustic oscillations differs significantly …
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A Study of the Dynamics of Laminar and Turbulent Fully and Partially Premixed Flames
… order models for the dynamics of laminar flat flames, swirl stabilized turbulent flames, and in evaluating the effects of the variation in fuel composition on flame dynamics. The laminar flat flame study was conducted on instrument grade methane, propane, and ethane flames for four total flow …
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Turbulent partially premixed combustion: DNS analysis and RANS simulation
… propulsion for all kinds of transport. Fuel-lean premixed combustion technology has been identified to be a promising approach, despite many difficulties involve, notably issues concerning flame stability and ignitability. A partially premixed system has been introduced to remedy these problems, …
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Simulation of partially premixed turbulent flames
This work numerically investigates the turbulent partially premixed flames, which are ubiquitous in combustion powered devices. This combustion mode involves many physical complexities such as flame propagation in unevenly premixed mixture of fuel and oxidiser, turbulence/flame interaction in …
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Modelling of Spray Combustion with Doubly Conditional Moment Closure
… of combustion regimes, where self-propagating premixed flames and diffusion-controlled non-premixed flames may occur simultaneously within the same flame. The physical processes involved in spray combustion and their interaction take place over a broad range of scales, which makes their …
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Analyses of Bluff Body and Swirl-Stabilised Flames Using Large Eddy Simulation
Premixed and partially premixed lean combustion is utilised in modern gas turbine systems, since an improved efficiency and lower flame temperatures can be achieved, thereby offering reductions in pollutant emissions. The stability of these flames in practical combustion systems, where ubiquitous …
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The Effects of Porous Inert Media in a Self-Excited Thermoacoustic Instability: A Study of Heat Release and Reduced Order Modelling
… consumption in industrial gas turbines, lean premixed combustion is utilized but is susceptible to thermoacoustic instabilities. These instabilities occur due to an in-phase relationship between acoustic pressure and unsteady heat release in a combustor. Thermoacoustic instabilities have been …