Numerical investigation of the effect of wedge-type cavitating-bubble generator on attached unsteady cavitating flows using proper orthogonal decomposition method

doi:10.1007/s42241-023-0023-1

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	Numerical investigation of the effect of wedge-type cavitating-bubble generator on attached unsteady cavitating flows using proper orthogonal decomposition method
	Hong, Bojie ; Hu, Changli ; Wang ZY(王志英); Xing, Haojie
刊名	JOURNAL OF HYDRODYNAMICS
	2023-05
关键词	Cavitating-bubble generator proper orthogonal decomposition attached cavity vortex structures
ISSN号	1001-6058
DOI	10.1007/s42241-023-0023-1
英文摘要	The objective of this work is to reveal the effect of a passive control method called wedge-type cavitating-bubble generator (WCG) on the cloud cavitation dynamics of National Advisory Committee for Aeronautics (NACA) 66 hydrofoil. The simulations are performed using the Partially-averaged Navier-Stokes (PANS) method coupled with the Zwart cavitation model. The proper orthogonal decomposition (POD) method is applied to extract the dominant flow structures. The results show that the WCG can induce the attached cavity to occur just behind the WCG instead of the hydrofoil leading edge. During the periodical time-evolution process of the unsteady cavity, it is found that the attached cavity with a larger scale around the hydrofoil with WCG has a rougher surface, accompanied with more shedding behaviors of small cavities. This is further illustrated by the POD modes, that is, the mode 1 and modes 2-4 present the large and small cavity vortex structures respectively. Meanwhile, the dominant frequencies of 50 Hz, 47.5 Hz are given by the POD method respectively for the hydrofoils without and with WCG, which is in good agreement with that of FFT analysis. In addition, the correlation distribution of POD modal coefficients shows that the WCG can strengthen the vortex energy as well as the turbulence intensity.
分类号	二类
WOS研究方向	WOS:000989004400003
语种	英语
其他责任者	Hu, CL
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/92254]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
作者单位	1.(Wang Zhi-ying) Chinese Acad Sci Inst Mech Key Lab Mech Fluid Solid Coupling Syst Beijing 100190 Peoples R China 2.(Hong Bo-jie, Hu Chang-li, Xing Hao-jie) Nanjing Univ Sci & Technol Sch Energy & Power Engn Nanjing 210094 Peoples R China
推荐引用方式 GB/T 7714	Hong, Bojie,Hu, Changli,Wang ZY,et al. Numerical investigation of the effect of wedge-type cavitating-bubble generator on attached unsteady cavitating flows using proper orthogonal decomposition method[J]. JOURNAL OF HYDRODYNAMICS,2023.
APA	Hong, Bojie,Hu, Changli,王志英,&Xing, Haojie.(2023).Numerical investigation of the effect of wedge-type cavitating-bubble generator on attached unsteady cavitating flows using proper orthogonal decomposition method.JOURNAL OF HYDRODYNAMICS.
MLA	Hong, Bojie,et al."Numerical investigation of the effect of wedge-type cavitating-bubble generator on attached unsteady cavitating flows using proper orthogonal decomposition method".JOURNAL OF HYDRODYNAMICS (2023).