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Streamline segment analysis of turbulent premixed flames
Wang LP(王利坡); Chakraborty N; Zhang J(张健); Wang, LP (reprint author), Shanghai Jiao Tong Univ, UM SJTU Joint Inst, Shanghai 200240, Peoples R China.
Source PublicationPROCEEDINGS OF THE COMBUSTION INSTITUTE
2013-02
Volume34Issue:1Pages:1401-1409
ISSN1540-7489
AbstractIn this study the streamline segment analysis has been carried out for turbulent premixed flames in order to analyze the statistical properties of the flame surface, which are associated with the nearby extremal points. The analysis is based on a DNS database of freely propagating turbulent premixed flames with a wide variation of turbulence and combustion parameters, spanning different combustion regimes. Typically a streamline segment can be characterized by its curve length l and the difference of the velocity magnitude at two extremal points Delta u. It has been found that an expression for the probability density function (PDF) of l, originally developed for non-reacting turbulent flows, remains valid for turbulent premixed flames in the thin reaction zones regime at high values of turbulent Reynolds number. However, the agreement between the theoretical prediction and the PDF of l obtained from DNS data worsens with decreasing turbulent Reynolds number, as well as in the corrugated flamelets regime. The joint PDFs between l and Delta u and between l and Delta rho u have been analyzed in detail, and it has been found that turbulence intensity, heat release parameter and the regime of combustion have significant effects on these joint PDFs. Detailed explanations have been provided for the observed differences in the topological behaviors of the streamline segment statistics in response to the combustion kinematics and dynamics.
KeywordTurbulent Premixed Flame Streamline Segment Analysis Direct Numerical Simulation Flame Topology
Subject Area流体力学
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000313125400144
Funding Organizationstate key lab of nonlinear mechanics; NSFC [11172175]; EPSRC, UK
DepartmentLNM湍流
Classification一类
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/47035
Collection非线性力学国家重点实验室
Corresponding AuthorWang, LP (reprint author), Shanghai Jiao Tong Univ, UM SJTU Joint Inst, Shanghai 200240, Peoples R China.
Recommended Citation
GB/T 7714
Wang LP,Chakraborty N,Zhang J,et al. Streamline segment analysis of turbulent premixed flames[J]. PROCEEDINGS OF THE COMBUSTION INSTITUTE,2013,34(1):1401-1409.
APA Wang LP,Chakraborty N,Zhang J,&Wang, LP .(2013).Streamline segment analysis of turbulent premixed flames.PROCEEDINGS OF THE COMBUSTION INSTITUTE,34(1),1401-1409.
MLA Wang LP,et al."Streamline segment analysis of turbulent premixed flames".PROCEEDINGS OF THE COMBUSTION INSTITUTE 34.1(2013):1401-1409.
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