Results 11 to 20 of about 186,702 (237)
Characteristics Of Large Diffusion Flames Burning In A Vitiated Atmosphere [PDF]
, 1991 Experiments concerning properties of large diffusion flames burning steadily in a vitiated atmosphere under conditions similar to those which may arise in a room fire are described. The effects of vitiation on the products of combustion and flame lengths,
Kubota, T. +2 more
core +1 more source
Non-Premixed Filtered Tabulated Chemistry: Filtered Flame Modeling of Diffusion Flames
Fuels, 2021 The flame front filtering is a well-known strategy in turbulent premixed combustion. An extension of this approach for the non-premixed combustion context has been proposed by means of directly filtering counterflow diffusion flamelets. Promising results
Pedro Javier Obando Vega +3 more
doaj +1 more source
Assessing diffusion model impacts on enstrophy and flame structure in turbulent lean premixed flames [PDF]
, 2021 Diffusive transport of mass occurs at small scales in turbulent premixed flames. As a result, multicomponent mass diffusion, which is often neglected in direct numerical simulations (DNS) of premixed combustion, has the potential to impact both turbulence and flame characteristics at small scales.
arxiv +1 more source
Analysis of LPG diffusion flame in tube type burner
Journal of Mechanical Engineering and Sciences, 2019 The present research aims to analyse diffusion flame in a tube type burner with Liquefied petroleum gas (LPG) as a fuel. An experimental investigation is performed to study flame appearance, flame stability, Soot free length fraction (SFLF) and CO ...
Vipul Patel, Rupesh Shah
doaj +1 more source
Flamelet modeling of thermo-diffusively unstable hydrogen-air flames [PDF]
, 2023 In order to reduce CO2 emissions, hydrogen combustion has become increasingly relevant for technical applications. In this context, lean H2-air flames show promising features but, among other characteristics, they tend to exhibit thermo-diffusive instabilities.
arxiv +1 more source
Journal of Fluid Science and Technology, 2008 The detailed behaviors of gaseous and spray lifted flames are studied by two- dimensional direct numerical simulations (DNS), and the characteristics of the flamelets are investigated in terms of two key variables for flamelet modeling, namely mixture ...
Yuya BABA, Ryoichi KUROSE
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Modeling the boundary-layer flashback of premixed hydrogen-enriched swirling flames at high pressures [PDF]
Combust. Flame 255 (2023) 112900, 2023 We model the boundary-layer flashback (BLF) of CH$_4$/H$_2$/air swirling flames via large-eddy simulations with the flame-surface-density method (LES-FSD), in particular, at high pressures. A local displacement speed model tabulating the stretched flame speed is employed to account for the thermo-diffusive effects, flame surface curvature, and heat ...
arxiv +1 more source
Energies, 2023 In this paper, a large-eddy simulation (LES) of turbulent non-premixed LO2/CH4 combustion under transcritical conditions is performed based on the Mascotte test rig from the Office National d’Etudes et de Recherches Ae´rospatiales (ONERA), and the aim is
Siyuan Wang +3 more
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Assessing the impact of multicomponent diffusion in direct numerical simulations of premixed, high-Karlovitz, turbulent flames [PDF]
Combust. Flame 223 (2021) 216-229, 2020 Implementing multicomponent diffusion models in numerical combustion studies is computationally expensive; to reduce cost, numerical simulations commonly use mixture-averaged diffusion treatments or simpler models. However, the accuracy and appropriateness of mixture-averaged diffusion has not been verified for three-dimensional, turbulent, premixed ...
arxiv +1 more source
Nihon Kikai Gakkai ronbunshu, 2018 Partial combustion is applied for tar reduction in the gasified-gas of woody biomass. An inverse diffusion flame was formed in partial-combustion-type gas reformer.
Zhiren BAI +3 more
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