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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); Li, S (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, 15 Beisihuanxi Rd, Beijing 100190, Peoples R China.
Source PublicationAPPLIED THERMAL ENGINEERING
2016
Volume106Pages:1458-1465
ISSN1359-4311
AbstractThe 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.
KeywordFlame Structure Soot Formation Pressure N-heptane Skeletal Mechanism
DOI10.1016/j.applthermaleng.2016.03.006
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000381530600146
WOS KeywordFlame structure ; Soot formation ; Pressure ; n-heptane ; Skeletal mechanism
WOS Research AreaThermodynamics ; Energy & Fuels ; Engineering ; Mechanics
WOS SubjectThermodynamics ; Energy & Fuels ; Engineering, Mechanical ; Mechanics
Funding OrganizationFinancial support by National Natural Science Foundation of China (No. 51376189) is acknowledged.
DepartmentLHD应用等离子体力学(CPCR)
Classification一类
RankingTrue
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/59737
Collection高温气体动力学国家重点实验室
Corresponding AuthorLi, S (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, 15 Beisihuanxi Rd, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Li S,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,&Li, S .(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,et al."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.
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