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Showing 1 to 11 of 11 for “"premixed turbulent flames"”.
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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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A fractal analysis of premixed turbulent flames
… experimental study, the fractal behavior of lean premixed wrinkled turbulent flames was investigated over a range of turbulence conditions. For this purpose a turbulent combustion rig was designed and built in which the turbulence intensity and scale could be independently varied by means of a set …
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Propagation of large scale premixed turbulent flames
We examine premixed turbulent combustion within the context of a hydrodynamic model derived from physical first principles. This is an asymptotic model that exploits the multi-scale nature of the problem, characterized by two disparate length scales: the diffusion length scale representing the …
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Studies of premixed turbulent flames under flamelet assumptions
Turbulent burning velocity is a crucial factor in describing how fast premixed flame can burn, while it is still not well-predictable under various turbulence levels and flame conditions. A clearer definition of turbulent burning velocity based on the reaction rate will help understand the …
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Influences of the Darrieus-Landau instability on premixed turbulent flames
… its inventors. The instability, which prevents flames from being too flat, was thought to lead immediately to turbulent flames. Recent studies, initiated by weakly nonlinear analyses and extended by two-dimensional simulations suggest that this is not the case. It was established that the flame, …
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Flow Field and Soot Formation Characteristics in Swirl-stabilized Non-premixed Turbulent Flames
… flow fields were investigated experimentally in turbulent swirl-stabilized non-premixed flames using three different fuels: methane, ethanol and aviation Jet A-1. The studied flames were confined and stabilized in a model gas turbine combustor with a swirl number of ~0.55. Soot volume fraction, …
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Development and application of a light scattering technique for the study of premixed turbulent flames.
Massachusetts Institute of Technology. Dept. of Chemical Engineering. Thesis. 1966. Ph.D.
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Application of Crossed-Plane Tomography and Stereo Particle Image Velocimetry for Three-Dimensional Analysis of Premixed Turbulent Flames
… instantaneous flamelet surface normal vectors in premixed turbulent flames to study the wrinkling of flamelet surfaces and the internal structure of the flamelet. CPLT was applied to measure flamelet orientations of premixed turbulent V-flames with increasing downstream distance from the …
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Isosurface Interactions Within Turbulent Premixed Hydrogen and Hydrocarbon Flames
… better insight into 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 …
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Development of novel laser diagnostic techniques for the quantitative study of premixed flames
… the determination of flamefront properties in premixed flames that can serve as input data for computational fluid dynamical (CFD) models in technical combustion. The work comprises of a number of related studies, to address problems of relevance in the field of combustion research. The first …
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Experimental Investigation of Large Scale Aerodynamics on Soot Emissions in Swirling Flows
… Rich-Quench-Lean (RQL) technology that employs turbulent swirling flames with downstream dilution air. These turbulent flames exhibit spatial and temporal fluctuations not present in laminar flames. This adds a level of complexity to turbulent soot studies that is yet to be fully understood. In …