Application of dynamic zone flamelet model to a GH2/GO2 rocket combustor
文献类型：会议论文
| 作者 | Yao W(姚卫) ; Li B(李波)
|
| 出版日期 | 2019 |
| 会议日期 | August 19, 2019 - August 22, 2019 |
| 会议地点 | Indianapolis, IN, United states |
| 关键词 | Dynamic zone flamelet model GH2/GO2 Large Eddy Simulation (LES) Rocket combustor Turbulence-chemistry interaction |
| 英文摘要 | A dynamic zone flamelet model is proposed and validated in this study. The model divides the whole computational domain into different zones and uses a local flamelet to describe the chemistry status within each zone. The zone division constantly updates with the time-variant mixture fraction fields. Each zone is in irregular shape and contains a random number of CFD cells. The flamelet evolution equation due to convective transport, molecular diffusion, and chemical reactions is derived through redefining the conditional average within each zone. In highly compressible supersonic flows, the density, temperature, and velocity do not correlate with the mixture fraction any more; thus only the species mass fraction in each flamelet is used. The flamelet temperature equation is not solved, but a computationally-efficient statistical method is used for the conditional temperature, which then determines the reaction progress. The DZFM is then applied to a GH2/GO2 rocket combustor based on an Improved Delayed Detached Eddy Simulation (IDDES) framework and a total of 20,557 flamelet zones. The predicted wall heat flux, mean temperature and mean hydrogen concentration are generally comparable with the available experimental measurement and the previous predictions in the literature. The evolution of flamelet variables with the axial height and the time shows that the current model has the capability of characterizing the transient chemistry status, which would especially useful for unsteady combustion modeling by large eddy simulation. © 2019, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved. |
| 会议录 | AIAA Propulsion and Energy Forum and Exposition, 2019
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| 语种 | 英语 |
| URL标识 | 查看原文 |
| ISBN号 | 9781624105906 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/85099]  |
| 专题 | 力学研究所_高温气体动力学国家重点实验室 |
| 作者单位 | 1.School of Engineering Science, University of Chinese Academy of Science, Beijing, 100049, China 2.Key Laboratory of High-Temperature Gas Dynamics, Institute of Mechanics, CAS, Beijing, 100190, China |
| 推荐引用方式 GB/T 7714 | Yao W,Li B. Application of dynamic zone flamelet model to a GH2/GO2 rocket combustor[C]. 见:. Indianapolis, IN, United states. August 19, 2019 - August 22, 2019. |
入库方式： OAI收割
来源：力学研究所
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