Analysis of the high-speed jet in a liquid-ring pump ejector using a proper orthogonal decomposition method

doi:10.1080/19942060.2022.2089733

	Analysis of the high-speed jet in a liquid-ring pump ejector using a proper orthogonal decomposition method
	Jiang, Li-Jie 1; Zhang, Ren-Hui 1,2; Chen, Xue-Bing 1; Guo, Guang-Qiang 1,2
刊名	ENGINEERING APPLICATIONS OF COMPUTATIONAL FLUID MECHANICS
	2022-12-31
卷号	16 期号:1 页码:1382-1394
关键词	Liquid-ring pump ejector POD LES shock wave reduced order model
ISSN号	1994-2060
DOI	10.1080/19942060.2022.2089733
英文摘要	To analyze the complex spatiotemporal evolution law of the high-speed jet flow field in a liquid-ring pump ejector, both the classic and spectral proper orthogonal decomposition (SPOD) methods were introduced to decompose the transient flow field based on the numerical large eddy simulation. The proper orthogonal decomposition (POD) reduced order model (ROM) of the complex flow in the ejector was established to analyze the transient characteristics and reconstruct the flow field. The spatial mode characteristics of density, pressure and vorticity field, and the frequency domain characteristics of mode coefficients were analyzed. The results show that the spatiotemporal decoupling analysis of a high-speed jet flow field can be accomplished by the POD and SPOD methods. A large-scale symmetric coherent structure is formed in the shear layer of the first two modes of vorticity, and a small-scale antisymmetric structure is formed at the trailing edge of the jet flow for the third and fourth modes. This reflects the evolutionary characteristics of the jet shear vortex. There is a significant spatial correlation between the density and pressure modes, reflecting that the evolution of the two structures has important correlation characteristics. The spectral analysis of the mode coefficients shows that the dominant frequencies of 1250 Hz and 18 kHz correspond to the self-excited oscillation frequency of shock waves and the vortex shedding frequency. The POD-ROM can reconstruct the high-speed flow field of the ejector with enough accuracy using the first 30-order modes, and the root mean square error and mean absolute percentage error for the velocity prediction are 0.48% and 0.24%, respectively.
WOS研究方向	Engineering ; Mechanics
语种	英语
出版者	TAYLOR & FRANCIS LTD
WOS记录号	WOS:000821351200001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158871]
专题	能源与动力工程学院
作者单位	1.Lanzhou Univ Technol, Sch Energy & Power Engn, Lanzhou, Peoples R China; 2.Key Lab Fluid Machinery & Syst, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Li-Jie,Zhang, Ren-Hui,Chen, Xue-Bing,et al. Analysis of the high-speed jet in a liquid-ring pump ejector using a proper orthogonal decomposition method[J]. ENGINEERING APPLICATIONS OF COMPUTATIONAL FLUID MECHANICS,2022,16(1):1382-1394.
APA	Jiang, Li-Jie,Zhang, Ren-Hui,Chen, Xue-Bing,&Guo, Guang-Qiang.(2022).Analysis of the high-speed jet in a liquid-ring pump ejector using a proper orthogonal decomposition method.ENGINEERING APPLICATIONS OF COMPUTATIONAL FLUID MECHANICS,16(1),1382-1394.
MLA	Jiang, Li-Jie,et al."Analysis of the high-speed jet in a liquid-ring pump ejector using a proper orthogonal decomposition method".ENGINEERING APPLICATIONS OF COMPUTATIONAL FLUID MECHANICS 16.1(2022):1382-1394.