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题名: Numerical investigation of the boundary layer separation in chemical oxygen iodine laser
作者: Huai, Ying1;  Jia, Shuqin1, 2;  Wu, Kenan1;  Jin, Yuqi1;  Sang, Fengting1
关键词: Boundary layer separation ;  large Eddy simulation ;  Shock waves ;  Chemical oxygen iodine laser
刊名: OPTICS AND LASER TECHNOLOGY
发表日期: 2017-11-01
DOI: 10.1016/j.optlastec.2017.05.024
卷: 96, 页:276-282
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Optics ;  Physics, Applied
研究领域[WOS]: Optics ;  Physics
英文摘要: Large eddy simulation is carried out to model the flow process in a supersonic chemical oxygen iodine laser. Unlike the common approaches relying on the tensor representation theory only, the model in the present work is an explicit anisotropy-resolving algebraic Subgrid-scale scalar flux formulation. With an accuracy in capturing the unsteady flow behaviours in the laser. Boundary layer separation initiated by the adverse pressure gradient is identified using Large Eddy Simulation. To quantify the influences of flow boundary layer on the laser performance, the fluid computations coupled with a physical optics loaded cavity model is developed. It has been found that boundary layer separation has a profound effect on the laser outputs due to the introduced shock waves. The F factor of the output beam decreases to 10% of the original one when the boundary transit into turbulence for the setup depicted in the paper. Because the pressure is always greater on the downstream of the boundary layer, there will always be a tendency of boundary separation in the laser. The results inspire designs of the laser to apply positive/-passive control methods avoiding the boundary layer perturbation. (C) 2017 Elsevier Ltd. All rights reserved.
语种: 英语
WOS记录号: WOS:000405051800039
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/152058
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, 273 Zhongshan Rd, Dalian 116023, Liaoning, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Recommended Citation:
Huai, Ying,Jia, Shuqin,Wu, Kenan,et al. Numerical investigation of the boundary layer separation in chemical oxygen iodine laser[J]. OPTICS AND LASER TECHNOLOGY,2017,96:276-282.
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