Development of zone flamelet modelfor scramjet combustor modeling

	Development of zone flamelet modelfor scramjet combustor modeling
	Yao W(姚卫)1,2 ; Fan XJ(范学军)1,2
会议录名称	21st AIAA International Space Planes and Hypersonics Technologies Conference, Hypersonics 2017
	2017
会议名称	21st AIAA International Space Planes and Hypersonics Technologies Conference, Hypersonics 2017
会议日期	March 6, 2017 - March 9, 2017
会议地点	Xiamen, China
摘要	To alleviate the huge computational cost in supersonic combustor modeling and to improve the accuracy of traditional unsteady flamelet model, a zone flamelet is proposed. The main idea of zone flamelet is to divide the whole turbulent combustion field into a finite number of control zones and the chemical status in each zone is represented by a single flamelet. With proper zone division, the local flow conditions can be assumed to be homogeneous, where the scattering of variables over the mixture fraction space is in controllable small, thus the representative flamelet approaches the real scalar distribution. The flamelets exchange information through flux-conserved convection when across the zone boundary, thus the flamelet variables can be transport from upstream to downstream in a flow manner. Although one additional mixture fraction is resolved, great computational cost is still saved because the zone division in physical space is much coarser than the flow simulation mesh. A simple historical statistics approach is proposed to estimate the representative temperature, in order to further alleviate the computational cost in solving the flamelet temperature equation usually with numerous sub-models for non-adiabatic terms, e.g. radiation and wall heat loss. The zone flamelet model is then applied to model a scramjet combustor operated at a flight Mach number of 6.5 and a fuel equivalence ratio of 0.8. The performance of zone flamelet model in highly non-equilibrium supersonic combustion is compared with the traditional PaSR model. © 2017, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
关键词	Combustion Cost benefit analysis Costs Mixtures Ramjet engines Supersonic aircraft Computational costs Equivalence ratios Local flow conditions Scramjet combustors Statistics approaches Supersonic combustion Supersonic combustors Turbulent combustion
ISBN号	9781624104633
收录类别	EI
语种	英语
文献类型	会议论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/78014
专题	高温气体动力学国家重点实验室
作者单位	1.Key Laboratory of High Temperature Gas Dynamics, Institute of Mechanics, CAS, No.15 Beisihuanxi Road, Beijing; 100190, China; 2.School of Engineering Science, University of Chinese Academy of Science, Beijing; 100049, China
推荐引用方式 GB/T 7714	Yao W,Fan XJ. Development of zone flamelet modelfor scramjet combustor modeling[C]21st AIAA International Space Planes and Hypersonics Technologies Conference, Hypersonics 2017,2017.

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