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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 Publication20th AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 2015
2015
Conference Name20th AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 2015
Conference DateJuly 6, 2015 - July 9, 2015
Conference PlaceGlasgow, United kingdom
AbstractIn 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.
KeywordCombustion Pro Cess Directed Relation Graph Dynamic Evolution Fuel Injection Velocities Kinetic Mechanism Reduced Mechanisms Temperature Profiles Temporal And Spatial Evolutions
DepartmentLHD高超声速推进技术
ISBN9781624103209
URL查看原文
Indexed ByEI
Language英语
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/60165
Collection高温气体动力学国家重点实验室
Corresponding AuthorZhong, 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],2015.
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