The effect of baffle on flow structures and dynamics stirred by pitch blade turbine

doi:10.1016/j.cherd.2021.01.017

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	The effect of baffle on flow structures and dynamics stirred by pitch blade turbine
	Fan, Ying 4,5; Sun, Jiao 4,5,6; Jin, Jie 1,3; Zhang, Hui 2; Chen, Wenyi 4,5
刊名	Chemical Engineering Research and Design
	2021-04-01
卷号	168 页码:227-238
关键词	Flow fields Flow structure Tanks (containers) Turbine components Velocity measurement Decomposition methods Favorable conditions Particle image velocimetries Pitched blade turbine Proper orthogonal decomposition method Small-scale flow structure Small-scale structures Turbulent characteristics
ISSN号	0263-8762
DOI	10.1016/j.cherd.2021.01.017
英文摘要	• In order for a better understanding of how baffle impacts on the flow field stirred by pitched blade turbine (PBT), the Particle Image Velocimetry (PIV) experiment was conducted in baffled and unbaffled tank, with time-averaged method, phase-resolved method and Proper Orthogonal Decomposition (POD) method applied to analyze the turbulent characteristics. The POD quadruple decomposition method was adopted to decompose the flow structures of different scales. As indicated by the experimental results, in the measured area, an independent circulation area develops under the impeller, thus forming a pattern of double circulation flow in the unbaffled tank. There is a relatively concentrated distribution of incoherent flow structures in the stirred flow field, and these small-scale flow structures hinder transfer to the whole stirred tank, which makes it easy for the difference in local concentration to arise. With the addition of baffle, the axial discharge of fluid is enhanced, and the independent circulation area under the turbine shows change, and the large-scale convection of main body develops. The stirring-induced incoherent flow structure shows a wider range of distribution, while the small-scale structure under the stirring tank creates a more favorable condition for the diffusion into the whole stirred tank. © 2021 Institution of Chemical Engineers
WOS研究方向	Engineering
语种	英语
出版者	Institution of Chemical Engineers
WOS记录号	WOS:000632755100001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/147701]
专题	兰州理工大学
作者单位	1.School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Science and Technology on Transient Physics Laboratory, Nanjing University of Science and Technology, Nanjing; 210094, China 3.Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai Institute of Applied Mathematics and Mechanics, School of Mechanics and Engineering Science, Shanghai University, Shanghai; 200444, China; 4.Department of Process Equipment and Control Engineering, Hebei University of Technology, Tianjin; 300130, China; 5.Research Center of Engineering Fluid and Process Enhancement, Hebei University of Technology, Tianjin; 300130, China; 6.Department of Mechanics, School of Mechanical Engineering, Tianjin University, Tianjin; 300350, China;
推荐引用方式 GB/T 7714	Fan, Ying,Sun, Jiao,Jin, Jie,et al. The effect of baffle on flow structures and dynamics stirred by pitch blade turbine[J]. Chemical Engineering Research and Design,2021,168:227-238.
APA	Fan, Ying,Sun, Jiao,Jin, Jie,Zhang, Hui,&Chen, Wenyi.(2021).The effect of baffle on flow structures and dynamics stirred by pitch blade turbine.Chemical Engineering Research and Design,168,227-238.
MLA	Fan, Ying,et al."The effect of baffle on flow structures and dynamics stirred by pitch blade turbine".Chemical Engineering Research and Design 168(2021):227-238.