Comparison of Reynolds Averaged Navier-Stokes Based Simulation and Large-eddy Simulation for One Isothermal Swirling Flow

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	Comparison of Reynolds Averaged Navier-Stokes Based Simulation and Large-eddy Simulation for One Isothermal Swirling Flow
	Yang Yang; Soiren Knudsen Kaer
刊名	JOURNAL OF THERMAL SCIENCE
	2012
卷号	21 期号:2 页码:154,161
关键词	Large Eddy Simulation Vortex Breakdown Vorticity Field Coherent Structure
英文摘要	The flow structure of one isothermal swirling case in the Sydney swirl flame database was studied using two numerical methods. Results from the Reynolds-averaged Navier-Stokes (RANS) approach and large eddy simulation (LES) were compared with experimental measurements. The simulations were applied in two different Cartesian grids which were investigated by a grid independence study for RANS and a post-estimator for LES. The RNG k-ɛ turbulence model was used in RANS and dynamic Smagorinsky-Lilly model was used as the sub-grid scale model in LES. A validation study and cross comparison of ensemble average and root mean square (RMS) results showed LES outperforms RANS statistic results. Flow field results indicated that both approaches could capture dominant flow structures, like vortex breakdown (VB), and precessing vortex core (PVC). Streamlines indicate that the formation mechanisms of VB deducted from the two methods were different. The vorticity field was also studied using a velocity gradient based method. This research gained in-depth understanding of isothermal swirling flow.
公开日期	2013-01-07
内容类型	期刊论文
源URL	[http://ir.etp.ac.cn/handle/311046/51739]
专题	工程热物理研究所_Journal of Thermal Science
推荐引用方式 GB/T 7714	Yang Yang,Soiren Knudsen Kaer. Comparison of Reynolds Averaged Navier-Stokes Based Simulation and Large-eddy Simulation for One Isothermal Swirling Flow[J]. JOURNAL OF THERMAL SCIENCE,2012,21(2):154,161.
APA	Yang Yang,&Soiren Knudsen Kaer.(2012).Comparison of Reynolds Averaged Navier-Stokes Based Simulation and Large-eddy Simulation for One Isothermal Swirling Flow.JOURNAL OF THERMAL SCIENCE,21(2),154,161.
MLA	Yang Yang,et al."Comparison of Reynolds Averaged Navier-Stokes Based Simulation and Large-eddy Simulation for One Isothermal Swirling Flow".JOURNAL OF THERMAL SCIENCE 21.2(2012):154,161.