Spark ignition of turbulent nonpremixed bluff-body flames

Ahmed, Samer F.; Balachandran, Ramanarayanan; Marchione, Teresa; Mastorakos, Epaminondas

doi:10.1016/j.combustflame.2007.06.012

Cited by 150 publications

(136 citation statements)

References 37 publications

(60 reference statements)

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“…[1] and Ayache et al [3] have conducted measurements to quantify the velocity field of the cold flow in this same experimental apparatus. The former has provides measurements of the velocity field in the absence of acoustic excitation and the latter provides the axial velocity of the acoustically excited flow for the above mentioned excitation parameters.…”

Section: Methodsmentioning

confidence: 99%

Examination of an Oscillating Flame in the Turbulent Flow Around a Bluff Body with Large Eddy Simulation Based on the Probability Density Function Method

Jones

Jurisch

Marquis

2015

Flow Turbulence Combust

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The present paper describes a Large Eddy Simulation modelling framework for the simulation of oscillating flames in practical flow configurations. The unresolved subfilter scale motion is modelled using the dynamic Smagorinsky model in combination with the Probability Density Function method. It is shown that the Large Eddy Simulation method is capable of reproducing the characteristic shape of the reaction zone as well as the nonlinear evolution of the total heat release rate in a bluff-body stabilised combustor. Commonly used measures for quantifying the variation of the total heat release rate are evaluated and examined in the present flow configuration of a lean-premixed ethylene-air flame. It was found that formaldehyde-based measures do not appropriately reproduce the amplitude and phase of the total heat release rate. A significantly improved correlation was achieved by employing the product of the mass fractions of molecular oxygen (O 2 ) and the ketenyl radical (HCCO) as a means of characterising the variation of the total heat release rate.

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Section: Methodsmentioning

confidence: 99%

Examination of an Oscillating Flame in the Turbulent Flow Around a Bluff Body with Large Eddy Simulation Based on the Probability Density Function Method

Jones

Jurisch

Marquis

2015

Flow Turbulence Combust

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“…In turbulent non-premixed configurations such as jet and bluff-body flows, ignition failure is mainly due to incomplete mixing at the spark location [8,9].…”

Section: Introductionmentioning

confidence: 99%

Large eddy simulation of laser ignition and compressible reacting flow in a rocket-like configuration

Lacaze

Cuenot

Poinsot

et al. 2009

Combustion and Flame

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“…For the central reflow burner model used in this paper, the turbulence intensity is larger in the recirculation zone, CH 4 and air mixture are more sufficient, which can be regarded as premixed combustion. According to the experimental data of the flame propagation velocity of different equivalence ratios of Andrews et al [9] , the cubic function expression of the CH 4 laminar flame propagation velocity with respect to the equivalence ratio is obtained as shown in Fig.4 …”

Section: Efficiency Functionmentioning

confidence: 99%

“…(a ') ~ (n') are the numerical simulation results based on the dynamic thickened flame model, (a) ~ (n) are the corresponding experimental result [10] . It can be seen from the numerical simulation results that the flame core triggered by the heat source is almost formed and become ellipsoidal shape at 3ms, and begin to heat the unburned mixed gases near the core; 3ms to 9ms, the flame propagates into the reflux zone under the action of the return flow, the turbulence intensity in the recirculation zone is larger and the flame peak begin to spread gradually.…”

Section: （A）t=10ms （B）t=20msmentioning

confidence: 99%

“…The dynamic diffusion process of the flame in the whole ring is analyzed, it is found that the atomization effect of the nozzle has an important influence on the ignition performance of the combustion chamber. Lacaze [3] studied the ignition process of CH 4 turbulent premixed combustion with LES method based on the thickening flame model based on the experiment results of Ahmed [4] . The dynamic thickened flame model was optimized by Legier [5] based on the ATF model and taken both premixed and non-premixed flame situation into account, and Dynamic Thickening Flame (DTF) model was proposed at last.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

LES of the Ignition Process of Non-premixed CH4 based on Dynamic Thickened Flame Model

Jiang¹,

Yu-bing²,

Gao³

2017

Proceedings of the 2017 5th International Conference on Machinery, Materials and Computing Technology (ICMMCT 2017)

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Abstract. Improve the accuracy of ignition calculate simulation through dynamic thickening of the of flame front in order to achieve Large Eddy Simulation (LES) solution scales. Taking the WALL model which takes the sticky near the wall into account as the sub-grid turbulence model, simulating the process of energy releasing of spark plug by the way of adding Gauss heat source to the energy function. 40ms of the ignition process is calculated based on the cold state flow field, and compare the numerical simulation results with corresponding experimental results abroad. It shows: The simulation accuracy of cold flow field of LES is good, and be able to capture small-size vortex; Large Eddy Simulation based on dynamic thickening flame model is an effective method to predict the dynamic diffusion processes of CH 4 non-premixed flame; Recirculation zone plays an important role of fuel distribution, flame spread and stability.

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Spark ignition of turbulent nonpremixed bluff-body flames

Cited by 150 publications

References 37 publications

Examination of an Oscillating Flame in the Turbulent Flow Around a Bluff Body with Large Eddy Simulation Based on the Probability Density Function Method

Examination of an Oscillating Flame in the Turbulent Flow Around a Bluff Body with Large Eddy Simulation Based on the Probability Density Function Method

Large eddy simulation of laser ignition and compressible reacting flow in a rocket-like configuration

LES of the Ignition Process of Non-premixed CH4 based on Dynamic Thickened Flame Model

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