On the Space-Time Correlation of Heat Release Rate in Turbulent Premixed Flames
On the Space-Time Correlation of Heat Release Rate in Turbulent Premixed Flames
复制标题
湍流预混火焰放热速率的时空相关性研究
DOI:
10.1080/00102202.2015.1085861
复制
发表时间:
2016
影响因子:
1.9
通讯作者:
Yang Liu
中科院分区:
文献类型:
--
作者:
Yang Liu
ABSTRACT The spectral characteristics of combustion noise is dictated by the temporal correlation of the heat release rate fluctuation. This article investigates the two-point space-time correlation of heat release rate fluctuations by analyzing recent direct numerical simulation data of turbulent premixed flames. The results show that this correlation decays rapidly in both space and time due to the abrupt fluctuation of the heat release rate. The two-point space-time correlation can be modeled by Gaussian-type functions including the streamwise direction with strong convection. A flat low-frequency dependence is observed for the spectrum of the correlation function, which will allow the modeling of the spectral peak and the low-frequency spectral slope of combustion noise when multiplying the term ω2 (ω is the angular frequency). This exploratory work shows the potential of this correlation function for capturing the spectral shape of combustion noise.
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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
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:
2.5
作者:
Depuru Mohan N
通讯作者:
Depuru Mohan N
影响因子:
4.4
作者:
Liu Y
通讯作者:
Liu Y