Large eddy simulation of ignition and combustion of ethylene/air turbulent jet diffusion flame with reduced kinetic mechanism Ma SG(马素刚) Zhong FQ(仲峰泉) Zhang XY(张新宇) Zhong, Fengquan (fzhong@imech.ac.cn)
Source Publication 20th AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 2015
2015
Conference Name 20th AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 2015
Conference Date July 6, 2015 - July 9, 2015
Conference Place Glasgow, United kingdom
Abstract In this paper, unsteady process of ignition and combustion of turbulent plane-jet diffusion flame of ethylene/air at varied fuel/air ratios is numerically simulated with Large Eddy Simulation (LES) and a reduced kinetic mechanism of ethylene. The kinetic mechanism consisting of 25species and 131steps is reduced from a 71species/395steps detailed mechanism via the method of error-propagation-based directed relation graph (DRGEP) and sensitivity analysis. The LES results of height of flame lift-up and averaged temperature profiles at different downstream locations are compared with the DNS result of Yoo (2011) and satisfactory agreements are found. Unsteady processes of ignition and combustion of ethylene plane-jet diffusion flame are simulated with varied fuel injection velocities. Dynamic evolutions of temperature field as well as CH2 and OH radicals are obtained, which are found to be strongly related to turbulence eddies caused by jet/air mixing layer. The present numerical study shows that LES method with reduced mechanism of hydrocarbon fuels can effectively simulate temporal and spatial evolution of ignition and combustion process. © 2015, AIAA American Institute of Aeronautics and Astronautics. All rights reserved. Keyword Combustion Pro
Cess
Directed Relation Graph
Dynamic Evolution
Fuel Injection Velocities
Kinetic Mechanism
Reduced Mechanisms
Temperature Profiles
Temporal And Spatial Evolutions
Department LHD高超声速推进技术
ISBN 9781624103209
URL 查看原文
Indexed By EI
Language 英语
Document Type 会议论文
Identifier http://dspace.imech.ac.cn/handle/311007/60165
Collection 高温气体动力学国家重点实验室 Corresponding Author Zhong, Fengquan (fzhong@imech.ac.cn) Recommended Citation GB/T 7714
Ma SG,Zhong FQ,Zhang XY,et al. Large eddy simulation of ignition and combustion of ethylene/air turbulent jet diffusion flame with reduced kinetic mechanism[C]20th AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 2015,2015.
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; Zhong FQ(仲峰泉)
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