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   Articles with "premixed flame" as a keyword



Numerical Investigation on Porous Media Quenching Behaviors of Premixed Deflagrating Flame using RANS/LES Model

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recommendations! Published in 2019 at "Journal of Thermal Science"

DOI: 10.1007/s11630-019-1131-7

Abstract: To understand the mechanism of premixed flame quenching by porous media, a zonal hybrid RANS/LES model was employed, in which the LES flow solver was used to resolve the large turbulent structures within the non-porous… read more here.

Keywords: les model; quenching behaviors; porous media; premixed flame ... See more keywords

Dynamical response of a perfectly premixed flame and limit behavior for high power density systems

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recommendations! Published in 2018 at "Combustion and Flame"

DOI: 10.1016/j.combustflame.2018.02.007

Abstract: Abstract The interaction between a perfectly premixed flame and an acoustic wave is studied in a 1D configuration. The mathematical framework to represent the flame dynamics is based on a recent work by Chen et al.… read more here.

Keywords: high power; response; flame; density ... See more keywords

Ultra-rich fuel dynamics of a holder-stabilized premixed flame in a preheated mesoscale combustor

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recommendations! Published in 2021 at "Energy"

DOI: 10.1016/j.energy.2020.118960

Abstract: Abstract The present work experimentally studies the laminar premixed flame dynamics at fuel ultra-rich condition under the synergistic effect of heat and flow recirculation, which take place in many practical combustors, such as aero engines.… read more here.

Keywords: ultra rich; fuel dynamics; rich fuel; fuel ... See more keywords

Theoretical analysis for the centrifugal effect on premixed flame speed in a closed tube

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recommendations! Published in 2017 at "International Journal of Hydrogen Energy"

DOI: 10.1016/j.ijhydene.2017.04.186

Abstract: Abstract A theoretical analysis is described to study the effect of centrifugal acceleration, especially high centrifugal acceleration, i.e. more than 200 times of gravity acceleration (200g), on the premixed flame speed in a rotating closed… read more here.

Keywords: closed tube; temperature; flame; flame speed ... See more keywords

Effect of the initial pressures on evolution of intrinsically unstable hydrogen/air premixed flame fronts

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recommendations! Published in 2019 at "International Journal of Hydrogen Energy"

DOI: 10.1016/j.ijhydene.2019.04.220

Abstract: Abstract Laminar premixed flame front may be wrinkled due to the hydrodynamic and diffusive-thermal instabilities. This may lead to the occurrence of the cellular structure and the self-acceleration. The lean unstable hydrogen/air premixed flame at… read more here.

Keywords: hydrogen air; air premixed; premixed flame; flame front ... See more keywords

Evolution of local flame displacement speeds in turbulence

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recommendations! Published in 2019 at "Journal of Fluid Mechanics"

DOI: 10.1017/jfm.2019.896

Abstract: In this study, we assess the veracity of models for density-weighted local flame displacement speed of turbulent premixed flames. It will be shown that a combination of two models, one for the weakly stretched laminar… read more here.

Keywords: flame; local flame; turbulent premixed; flame displacement ... See more keywords

Experimental and Computational Study of the Combustion Characteristics of Dual-Stage Lean Premixed Flame

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recommendations! Published in 2019 at "Energy & Fuels"

DOI: 10.1021/acs.energyfuels.8b04492

Abstract: A new type of flame organization, dual-stage lean premixed (DLP) combustion, is proposed. It constructs lean premixed flame with nonuniform equivalence ratio in the combustion zone, which is aimed at improving the load adaptability and… read more here.

Keywords: lean premixed; stage lean; dual stage; premixed flame ... See more keywords

NOx Minimization in Staged Combustion Using Rich Premixed Flame in Porous Media

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recommendations! Published in 2019 at "Combustion Science and Technology"

DOI: 10.1080/00102202.2019.1622532

Abstract: ABSTRACT Two-stage combustion of methane/air is studied experimentally and numerically with a focus on achieving ultralow NOx emissions. The primary flame is a rich premixed flame in the porous medium. The flame is stabilized in… read more here.

Keywords: flame porous; flame; combustion; primary flame ... See more keywords

The Spatial Development Characteristics of High-Pressure Methane Jet Impinging on Methane Lean-Burn Premixed Flame

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recommendations! Published in 2024 at "Heat Transfer Engineering"

DOI: 10.1080/01457632.2024.2368436

Abstract: Abstract This work investigated the effect of high-pressure (10 MPa) methane gas jet impinging on the methane lean-burn premixed flame (equivalent ratio of 0.7) based on a three-dimensional numerical simulation by CONVERGE software. The results show… read more here.

Keywords: flame; premixed flame; jet; methane ... See more keywords

Experimental study on premixed flame combustion of annular burner with CO2 dilution based on OH-PLIF technology

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recommendations! Published in 2019 at "Cogent Engineering"

DOI: 10.1080/23311916.2019.1593074

Abstract: Abstract In view of the combustion characteristics of annular chamber of micro gas turbine, a planar laser-induced fluorescence (PLIF) technique was used to investigate the methane/air premixed turbulent multiple flames in the annular combustor and… read more here.

Keywords: combustion; co2; structure; flame structure ... See more keywords

Estimation of Temperature for Premixed Flame by Relative Permittivity and Conductivity

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recommendations! Published in 2024 at "IEEE Transactions on Instrumentation and Measurement"

DOI: 10.1109/tim.2024.3366578

Abstract: The flame temperature measurement is significant for studying combustion reaction mechanism, fuel conversion optimization, and pollutant formation control. A temperature estimation method for premixed flame by relative permittivity and conductivity is presented in this article.… read more here.

Keywords: temperature; premixed flame; conductivity; permittivity conductivity ... See more keywords