Streamline segment analysis of turbulent premixed flames

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	Streamline segment analysis of turbulent premixed flames
	Wang LP(王利坡); Chakraborty N; Zhang J(张健)
刊名	PROCEEDINGS OF THE COMBUSTION INSTITUTE
	2013-02
通讯作者邮箱	lipo.wang@sjtu.edu.cn
卷号	34 期号:1 页码:1401-1409
关键词	Turbulent premixed flame Streamline segment analysis Direct numerical simulation Flame topology
ISSN号	1540-7489
通讯作者	Wang, LP (reprint author), Shanghai Jiao Tong Univ, UM SJTU Joint Inst, Shanghai 200240, Peoples R China.
产权排序	[Wang, Lipo] Shanghai Jiao Tong Univ, UM SJTU Joint Inst, Shanghai 200240, Peoples R China; [Chakraborty, Nilanjan] Newcastle Univ, Sch Mech & Syst Engn, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England; [Wang, Lipo; Zhang, Jian] Chinese Acad Sci, Inst Mech, LNM, Beijing 100080, Peoples R China
中文摘要	In 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.
学科主题	流体力学
分类号	一类
收录类别	SCI ; EI
资助信息	state key lab of nonlinear mechanics; NSFC [11172175]; EPSRC, UK
原文出处	http://dx.doi.org/10.1016/j.proci.2012.06.142
语种	英语
WOS记录号	WOS:000313125400144
公开日期	2013-03-07
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/47035]
专题	力学研究所_非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Wang LP,Chakraborty N,Zhang J. 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.(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.