Towards the Development of an Evolution Equation for Flame Turbulence Interaction in Premixed Turbulent Combustion
Towards the Development of an Evolution Equation for Flame Turbulence Interaction in Premixed Turbulent Combustion
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预混湍流燃烧中火焰湍流相互作用演化方程的发展
DOI:
10.1007/s10494-014-9557-1
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
Ahmed U
中科院分区:
文献类型:
--
作者:
Ahmed U
Flame turbulence interaction is one of the leading order terms in the scalar dissipationtransport equation [35] and is thus an important phenomenon in premixed turbulent combustion. Swaminathan and Grout [36] and Chakraborty and Swaminathan [15, 16] have shown that the effect of strain rate on the transport ofis dominated by the interaction between the fluctuating scalar gradients and the fluctuating strain rate, denoted here by; this represents the flame turbulence interaction. In order to obtain an accurate representation of this phenomenon, a new evolution equation forhas been proposed. This equation gives a detailed insight into flame turbulence interaction and provides an alternative approach to model the important physics represented by. Theevolution equation is derived in detail and an order of magnitude analysis is carried out to determine the leading order terms in theevolution equation. The leading order terms are then studied using a Direct Numerical Simulation (DNS) of premixed turbulent flames in the corrugated flamelet regime. It is found that the behaviour ofis determined by the competition between the source terms (pressure gradient and the reaction rate), diffusion/dissipation processes, turbulent strain rate and the dilatation rate. Closures for the leading order terms inevolution equation have been proposed and compared with the DNS data.
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DOI:
10.1007/s10494-010-9304-1
发表时间:
2010
期刊:
Flow, Turbulence and Combustion
影响因子:
--
作者:
Dunstan T
通讯作者:
Dunstan T
影响因子:
4.6
作者:
N. Chakraborty;N. Swaminathan
通讯作者:
N. Chakraborty;N. Swaminathan
DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
A. Steinberg;J. Driscoll;N. Swaminathan
通讯作者:
N. Swaminathan
DOI:
10.1007/s10494-010-9284-1
发表时间:
2011-12
期刊:
Flow, Turbulence and Combustion
影响因子:
--
作者:
T. Dunstan;N. Swaminathan;K. Bray;R. Cant
通讯作者:
T. Dunstan;N. Swaminathan;K. Bray;R. Cant
影响因子:
4.4
作者:
Liu Y
通讯作者:
Liu Y