Influence of molecular transport on burning rate and conditioned species concentrations in highly turbulent premixed flames
Influence of molecular transport on burning rate and conditioned species concentrations in highly turbulent premixed flames
复制标题
分子传输对高湍流预混火焰中燃烧速率和调节物质浓度的影响
DOI：
10.1017/jfm.2021.794
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发表时间：
2021-10
影响因子：
3.7
通讯作者：
Lipatnikov A. N.
中科院分区：
文献类型：
--
作者：
Lee H. C.;Dai P.;Wan M.;Lipatnikov A. N.
Abstract Apparent inconsistency between (i) experimental and direct numerical simulation (DNS) data that show the significant influence of differential diffusion on the turbulent burning rate and (ii) recent complex-chemistry DNS data that indicate mitigation of the influence of differential diffusion on conditioned profiles of various local flame characteristics at high Karlovitz numbers, is explored by analysing new DNS data obtained from lean hydrogen–air turbulent flames. Both aforementioned effects are observed by analysing the same DNS data provided that the conditioned profiles are sampled from the entire computational domain. On the contrary, the conditioned profiles sampled at the leading edge of the mean flame brush do not indicate the mitigation, but are significantly affected by differential diffusion phenomena, e.g. because reaction zones are highly curved at the leading edge. This observation is consistent with a significant increase in the computed turbulent burning velocity with decreasing Lewis number, with all the results considered jointly being consonant with the leading point concept of premixed turbulent combustion. The concept is further supported by comparing DNS data obtained by allowing for preferential diffusion solely for a single species, either atomic or molecular hydrogen.
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影响因子：
4.4
作者：
Sheng Yang;A. Saha;W. Liang;Fujia Wu;C. Law
通讯作者：
Sheng Yang;A. Saha;W. Liang;Fujia Wu;C. Law
DOI：
10.1515/9781400862979.262
发表时间：
1992-01
期刊：
--
影响因子：
--
作者：
D. Frank-Kamenetskii
通讯作者：
D. Frank-Kamenetskii
DOI：
10.1007/bf00756242
发表时间：
1980
期刊：
Combustion, Explosion and Shock Waves
影响因子：
--
作者：
V. P. Karpov;E. S. Severin
通讯作者：
V. P. Karpov;E. S. Severin
影响因子：
4.6
作者：
V. Sabelnikov;A. Lipatnikov;S. Nishiki;H. Dave;F. H. Hernández Pérez;W. Song;H. Im
通讯作者：
V. Sabelnikov;A. Lipatnikov;S. Nishiki;H. Dave;F. H. Hernández Pérez;W. Song;H. Im
影响因子：
4.4
作者：
A. Gruber;M. Bothien;A. Ciani;K. Aditya;Jacqueline H. Chen;F. Williams
通讯作者：
A. Gruber;M. Bothien;A. Ciani;K. Aditya;Jacqueline H. Chen;F. Williams