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**Harvard**

Akkerman, V., Bychkov, V., Bastiaans, R., de Goey, L., van Oijen, J. och Eriksson, L. (2008) *Flow-flame interaction in a closed chamber*.

** BibTeX **

@article{

Akkerman2008,

author={Akkerman, V. B. and Bychkov, V. V. and Bastiaans, R. J. M. and de Goey, L. P. H. and van Oijen, J. A. and Eriksson, Lars-Erik},

title={Flow-flame interaction in a closed chamber},

journal={Physics of Fluids},

issn={1070-6631},

volume={20},

issue={5},

pages={21},

abstract={Numerous studies of flame interaction with a single vortex and recent simulations of burning in vortex arrays in open tubes demonstrated the same tendency for the turbulent burning rate proportional to U-rms lambda(2/3), where U-rms is the root-mean-square velocity and lambda is the vortex size. Here, it is demonstrated that this tendency is not universal for turbulent burning. Flame interaction with vortex arrays is investigated for the geometry of a closed burning chamber by using direct numerical simulations of the complete set of gas-dynamic combustion equations. Various initial conditions in the chamber are considered, including gas at rest and several systems of vortices of different intensities and sizes. It is found that the burning rate in a closed chamber (inverse burning time) depends strongly on the vortex intensity; at sufficiently high intensities it increases with U-rms approximately linearly in agreement with the above tendency. On the contrary, dependence of the burning rate on the vortex size is nonmonotonic and qualitatively different from the law lambda(2/3). It is shown that there is an optimal vortex size in a closed chamber, which provides the fastest total burning rate. In the present work, the optimal size is six times smaller than the chamber height.},

year={2008},

keywords={TURBULENT PREMIXED FLAMES, LARGE-EDDY SIMULATION, BURNING VELOCITIES, LARGE-SCALE, HIGH-PRESSURE, ACOUSTIC INSTABILITY, FRONT PROPAGATION, WEAKLY TURBULENT, HIGH-TEMPERATURE, RADIATED SOUND },

}

** RefWorks **

RT Journal Article

SR Electronic

ID 100913

A1 Akkerman, V. B.

A1 Bychkov, V. V.

A1 Bastiaans, R. J. M.

A1 de Goey, L. P. H.

A1 van Oijen, J. A.

A1 Eriksson, Lars-Erik

T1 Flow-flame interaction in a closed chamber

YR 2008

JF Physics of Fluids

SN 1070-6631

VO 20

IS 5

AB Numerous studies of flame interaction with a single vortex and recent simulations of burning in vortex arrays in open tubes demonstrated the same tendency for the turbulent burning rate proportional to U-rms lambda(2/3), where U-rms is the root-mean-square velocity and lambda is the vortex size. Here, it is demonstrated that this tendency is not universal for turbulent burning. Flame interaction with vortex arrays is investigated for the geometry of a closed burning chamber by using direct numerical simulations of the complete set of gas-dynamic combustion equations. Various initial conditions in the chamber are considered, including gas at rest and several systems of vortices of different intensities and sizes. It is found that the burning rate in a closed chamber (inverse burning time) depends strongly on the vortex intensity; at sufficiently high intensities it increases with U-rms approximately linearly in agreement with the above tendency. On the contrary, dependence of the burning rate on the vortex size is nonmonotonic and qualitatively different from the law lambda(2/3). It is shown that there is an optimal vortex size in a closed chamber, which provides the fastest total burning rate. In the present work, the optimal size is six times smaller than the chamber height.

LA eng

DO 10.1063/1.2919807

LK http://dx.doi.org/10.1063/1.2919807

OL 30