Effects of baffle on flow structure and cyclic variation in stirred tanks with Rushton turbine

doi:10.1063/5.0073821

	Effects of baffle on flow structure and cyclic variation in stirred tanks with Rushton turbine
	Fan, Ying 5,6; Sun, Jiao 4,5,6,7; Jin, Jie 1,2; Sun, Kangfu 5,6; Zhang, Hui 3; Chen, Wenyi 4,5,6; Li, Yibin 1
刊名	AIP ADVANCES
	2022
卷号	12 期号:1
关键词	Kinetic energy Kinetics Mass transfer Principal component analysis Tanks (containers) Turbulent flow Velocity measurement Cyclic variations Large-scales On flow Peak values Phase plane Rushton turbines Stirred Tank Structure variation Time-averaged velocity Value of time
DOI	10.1063/5.0073821
英文摘要	In order to reveal the effect of baffles on flow structure and cyclic variation stirred by Rushton turbines, particle image velocimetry experiments were performed in baffled and unbaffled stirred tanks. In a baffled tank, the peak value of time-averaged velocity obviously increases, the high velocity region enlarges significantly, and the fluctuation of fluid elements near the turbine increases significantly. In the 20 degrees phase plane of the baffled tank, the high swirl strength region slightly enlarges, but the peak of phase-resolved swirl strength is lower. The peak value and high value regions of turbulent kinetic energy are larger in the baffled stirred tank at various phase planes. Using quadruple proper orthogonal decomposition, the flow field is decomposed into a small-scale part, a transition part, a large-scale part, and a mean part with different spatial scales. Adding the baffle, the mean part with largest spatial scale obviously increases (it is favorable for mass transfer at different liquid levels) and the transition part, which mainly includes the random fluctuation of a turbulent cascade, slightly enhances (it is conducive to diffusion). The main influence of cyclic variation for various blade passages is the flow with large-scale, and the standard deviation of time coefficients decreases by 3%-4% for the mean part and the large-scale part by adding the baffle.
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	AIP Publishing
WOS记录号	WOS:000744937300008
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/154884]
专题	能源与动力工程学院
作者单位	1.Lanzhou Univ Technol, Sch Energy & Power Engn, Lanzhou 730050, Peoples R China; 2.Shanghai Univ, Sch Mech & Engn Sci, Shanghai Inst Appl Math & Mech, Shanghai Key Lab Mech Energy Engn, Shanghai 200444, Peoples R China; 3.Nanjing Univ Sci & Technol, Sci & Technol Transient Phys Lab, Nanjing 210094, Peoples R China; 4.Hebei Univ Technol, 300 Post Box,Guangrong Rd 8, Tianjin 300130, Peoples R China 5.Hebei Univ Technol, Dept Proc Equipment & Control Engn, Tianjin 300130, Peoples R China; 6.Hebei Univ Technol, Res Ctr Engn Fluid & Proc Enhancement, Tianjin 300130, Peoples R China; 7.Tianjin Univ, Sch Mech Engn, Dept Mech, Tianjin 300350, Peoples R China;
推荐引用方式 GB/T 7714	Fan, Ying,Sun, Jiao,Jin, Jie,et al. Effects of baffle on flow structure and cyclic variation in stirred tanks with Rushton turbine[J]. AIP ADVANCES,2022,12(1).
APA	Fan, Ying.,Sun, Jiao.,Jin, Jie.,Sun, Kangfu.,Zhang, Hui.,...&Li, Yibin.(2022).Effects of baffle on flow structure and cyclic variation in stirred tanks with Rushton turbine.AIP ADVANCES,12(1).
MLA	Fan, Ying,et al."Effects of baffle on flow structure and cyclic variation in stirred tanks with Rushton turbine".AIP ADVANCES 12.1(2022).