A sharp interface immersed boundary method for flow-induced noise prediction using acoustic perturbation equations

doi:10.1016/j.compfluid.2021.105032

CORC > 力学研究所 > 中国科学院力学研究所 > 高温气体动力学国家重点实验室

	A sharp interface immersed boundary method for flow-induced noise prediction using acoustic perturbation equations
	Zhao, Cheng 1,3; Yang Y(杨炎)1,2; Zhang, Tao 3; Dong, Haibo 1; Hou, Guoxiang 3
刊名	COMPUTERS & FLUIDS
	2021-09-15
卷号	227 页码:15
关键词	Acoustic perturbation equations Immersed boundary method Flow-induced noise Four-cylinder array
ISSN号	0045-7930
DOI	10.1016/j.compfluid.2021.105032
通讯作者	Zhang, Tao(zhangt7666@hust.edu.cn)
英文摘要	In this paper, a hybrid computational aero/hydro-acoustic approach is proposed to deal with acoustic scattering and flow-induced noise problems based on the sharp interface immersed boundary method (IBM). For the flow field, the incompressible Navier-Stokes equations are solved by an in-house direct numerical simulation solver. The acoustic field is predicted by solving acoustic perturbation equations (APEs). Both flow and acoustic solid boundaries with complexity and mobility are dealt with by the sharp interface IBM. Benchmark acoustic problems with varied scatterers in two and three dimensions are presented to validate the accuracy of the acoustic codes and boundary treatments. Then, the feasibility and accuracy of the present hybrid approach are validated by considering the problem of flow past a circular cylinder at a Reynolds number of 200. Subsequently, the present method is used to predict the noise generated by flow around a four-cylinder array in two-dimensions with two arrangements (i.e., square array and diamond array), and the flow and acoustic physics are investigated in detail. The results show that the square array retains a monopole-like sound-radiation shape, while the directivity pattern of the diamond array produces a dipole-like shape. In both the square and diamond arrays, the propagation of acoustic waves is affected by the Doppler effect, and the latter array results in a larger alternation of the propagation angle compared with the single cylinder due to the influence of the geometric configuration. The intensity of the radiated acoustic pressure is much greater for the diamond array compared to the square one in most circumferential directions, and the acoustic intensity of both arrays is greater than that of the single cylinder. The spectrums of the far-field acoustic pressure indicate that the two arrays and the single cylinder have similar peak frequencies and profiles, with vortex shedding playing the predominant role in noise generation in all three configurations. (c) 2021 Published by Elsevier Ltd.
分类号	二类
资助项目	ONR MURI grant[N00014-14-1-0533] ; NSF[CBET-1605232] ; NSFC[11602277] ; China Scholarship Council[201806160093] ; China Scholarship Council[201804910163]
WOS关键词	4 CYLINDERS ; INCOMPRESSIBLE FLOWS ; NUMERICAL-SIMULATION ; VORTEX DYNAMICS ; TURBULENT-FLOW ; CROSS-FLOW ; HYDRODYNAMICS ; COMPUTATION ; SCHEMES ; SOUND
WOS研究方向	Computer Science ; Mechanics
语种	英语
WOS记录号	WOS:000680347400009
资助机构	ONR MURI grant ; NSF ; NSFC ; China Scholarship Council
其他责任者	Zhang, Tao
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/87146]
专题	力学研究所_高温气体动力学国家重点实验室
作者单位	1.Univ Virginia, Dept Mech & Aerosp Engn, Charlottesville, VA 22904 USA 2.Chinese Acad Sci, Inst Mech, LHD, Beijing 100190, Peoples R China; 3.Huazhong Univ Sci & Technol, Sch Naval Architecture & Ocean Engn, Wuhan 430074, Hubei, Peoples R China;
推荐引用方式 GB/T 7714	Zhao, Cheng,Yang Y,Zhang, Tao,et al. A sharp interface immersed boundary method for flow-induced noise prediction using acoustic perturbation equations[J]. COMPUTERS & FLUIDS,2021,227:15.
APA	Zhao, Cheng,杨炎,Zhang, Tao,Dong, Haibo,&Hou, Guoxiang.(2021).A sharp interface immersed boundary method for flow-induced noise prediction using acoustic perturbation equations.COMPUTERS & FLUIDS,227,15.
MLA	Zhao, Cheng,et al."A sharp interface immersed boundary method for flow-induced noise prediction using acoustic perturbation equations".COMPUTERS & FLUIDS 227(2021):15.