Modeling of pressure effects on flame structure and soot formation of n-heptane/air co-flow laminar flames by skeletal reaction mechanism

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	Modeling of pressure effects on flame structure and soot formation of n-heptane/air co-flow laminar flames by skeletal reaction mechanism
	Li S(李森)
刊名	APPLIED THERMAL ENGINEERING
	2016
通讯作者邮箱	lisen@imechac.cn
卷号	106 页码:1458-1465
关键词	Flame structure Soot formation Pressure n-heptane Skeletal mechanism
ISSN号	1359-4311
通讯作者	Li, S (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, 15 Beisihuanxi Rd, Beijing 100190, Peoples R China.
产权排序	[Li, Sen] Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, 15 Beisihuanxi Rd, Beijing 100190, Peoples R China
中文摘要	The conversion from chemical energy to thermal energy by the high-pressure combustion of hydrocarbon fuel/air is often accompanied by pollution emissions of PAHs and soot in aircraft gas turbines and diesel engines, and the measurement and analysis of PAHs and soot formations in the practical turbulent flame of engines are difficult. In the study, based on the simulation of the simple laminar co-flow diffusion flame of n-heptane/air by the developed skeletal reaction mechanism, the effects of pressure on flame structure and soot formation are investigated. The results indicate that flame height keeps constant at 0.7 similar to 3.0 MPa; the flame radius decreases with pressure as p(-1/2); the maximum carbon conversion to soot (eta(s,max)) is proportional to pressure at 0.1 similar to 2.0 MPa; the maximum soot volume concentration (f(v,max)) increases with pressure as p(2); the locations of f(v,max) and eta(s,max) along flame centerline are inconsistent, and f(v,max) and eta(s,max) occur respectively at the middle and lower parts of flame height; f(v,max) occurs in the region where the mixture fraction and temperature are respectively 0.08 similar to 0.09 and about 1200 K. The diffusion flame consists of three zones: fuel heating zone, fuel-rich reaction zone and oxidizer-rich reaction zone. eta-C7H16 is firstly decomposed into small molecule gas (e.g., H-2, CH4, C2H2,C2H4, C2H6, C3H4, C3H6, etc.) in the heating zone, and PAHs (C6H6, C8H8 and C10H8) and soot precursors (C2H2, C6H5, C6H6 and C2H4) are formed in fuel-rich reaction zone. (C) 2016 Elsevier Ltd. All rights reserved.
分类号	一类
类目[WOS]	Thermodynamics ; Energy & Fuels ; Engineering, Mechanical ; Mechanics
研究领域[WOS]	Thermodynamics ; Energy & Fuels ; Engineering ; Mechanics
关键词[WOS]	Flame structure ; Soot formation ; Pressure ; n-heptane ; Skeletal mechanism
收录类别	SCI ; EI
原文出处	http://dx.doi.org/10.1016/j.applthermaleng.2016.03.006
语种	英语
WOS记录号	WOS:000381530600146
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/59737]
专题	力学研究所_高温气体动力学国家重点实验室
推荐引用方式 GB/T 7714	Li S. Modeling of pressure effects on flame structure and soot formation of n-heptane/air co-flow laminar flames by skeletal reaction mechanism[J]. APPLIED THERMAL ENGINEERING,2016,106:1458-1465.
APA	李森.(2016).Modeling of pressure effects on flame structure and soot formation of n-heptane/air co-flow laminar flames by skeletal reaction mechanism.APPLIED THERMAL ENGINEERING,106,1458-1465.
MLA	李森."Modeling of pressure effects on flame structure and soot formation of n-heptane/air co-flow laminar flames by skeletal reaction mechanism".APPLIED THERMAL ENGINEERING 106(2016):1458-1465.