Numerical simulations of turbulent lifted jet diffusion flames in a vitiated coflow using the stochastic multiple mapping conditioning approach
Numerical simulations of turbulent lifted jet diffusion flames in a vitiated coflow using the stochastic multiple mapping conditioning approach
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使用随机多重映射调节方法对损坏协流中的湍流提升射流扩散火焰进行数值模拟
DOI:
10.1016/j.proci.2018.05.043
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发表时间:
2019
影响因子:
3.4
通讯作者:
Andreas
中科院分区:
文献类型:
--
作者:
Sanjeev Kumar;Santanu;Kronenburg;Andreas
Lifted turbulent jet diffusion flames of H2/N2issued into a hot coflowing stream of combustion products from a lean premixed H2/air mixture are simulated using the stochastic multiple mapping conditioning (MMC) approach within the Reynolds-averaged Navier–Stokes (RANS) framework. The underlying turbulent flow is modeled using the two-equationk–ɛ model with modified constants. In the MMC approach, large-scale turbulent fluctuations are emulated by introducing suitable reference variables. A single reference variable is used here to describe the evolution of mixture fraction via a mapping function. The modified Curl's model has been adapted to model the micro-mixing term. A detailed chemical kinetic mechanism involving 9 species and 21 reversible reactions is used for H2/O2combustion. The computed results from the present simulations are found to be in excellent agreement with the available experimental data. Numerical results are found to be sensitive to change in the minor dissipation timescale, which certainly controls the conditional fluctuations around the conditional mean. Also, the predicted flame lift-off heights obtained using the minor mixing time constantCmin= 0.25 are found to be in close proximity with the experimentally observed values for the entire range of coflow temperatures.
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影响因子:
1.3
作者:
C. Straub;A. Kronenburg;K. Vogiatzaki
通讯作者:
K. Vogiatzaki
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
Andrew P. Wandel
通讯作者:
Andrew P. Wandel
DOI:
10.2514/8.1982
发表时间:
1951
期刊:
Journal of the Aeronautical Sciences
影响因子:
--
作者:
S. Corrsin
通讯作者:
S. Corrsin
影响因子:
4.6
作者:
A. Klimenko;S. Pope
通讯作者:
A. Klimenko;S. Pope
DOI:
10.1007/s10494-015-9626-0
发表时间:
2015
期刊:
Flow, Turbulence and Combustion
影响因子:
--
作者:
K. Vogiatzaki;S. Navarro-Martinez;A. Kronenburg
通讯作者:
A. Kronenburg