Passive control on deep cavity noise at subsonic speeds by leading-edge grooves

doi:10.1177/10775463231182256

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-)

	Passive control on deep cavity noise at subsonic speeds by leading-edge grooves
	Lu WS(陆维爽); Zheng GN(郑冠男)
刊名	JOURNAL OF VIBRATION AND CONTROL
	2023-07-28
关键词	cavity noise noise reduction passive control flow-acoustic feedback acoustic resonance
ISSN号	1077-5463
DOI	10.1177/10775463231182256
英文摘要	Control effects of leading-edge grooves on deep cavity noise are investigated numerically. The length-to-depth ratio of the grooves are 0.5, 1, and 4, respectively. The freestream Mach number is equal to 0.16, corresponding to the Re based on the cavity length of 7.7 x 10(5). The Detached Eddy Simulations (DES) combined with Ffowcs Williams-Hawkings (FW-H) acoustic analogy are adopted to simulate the characteristic information of the flow field and the acoustic field. The analysis results show that all grooves investigated in this paper have a certain noise control effect, and the groove with the most obvious noise reduction effect is the groove with a length-to-depth ratio of 0.5, namely, the deep groove. Narrowband noise generated by the flow-acoustic feedback (100-700 Hz) and the acoustic resonance mechanism (above 300 Hz) and broadband noise caused by the turbulent disturbance in the shear layer of the cavity mouth significantly reduce when the deep groove is used for the noise control. The reason for the noise reduction is that the leading-edge grooves can effectively change the flow characteristics near the mouth of the downstream cavity. When the flow passes the grooves, the groove flow reduces the energy in the fluid, resulting in the significant decrease of flow velocity of the boundary layer of the incoming flow of the cavity. In addition, the use of the deep groove also promotes the vortex concentration position to move towards the bottom of the cavity, pushes the energy in the shear layer of the downstream cavity towards the front-edge as well as the bottom of the cavity, and stabilizes the development of the shear layer near the cavity mouth.
分类号	二类
WOS研究方向	Acoustics ; Engineering ; Mechanics
语种	英语
WOS记录号	WOS:001039327400001
资助机构	Postdoctoral Fund of Chinese Academy of Sciences [E2XM0404]
其他责任者	Zheng, GN (corresponding author), Chinese Acad Sci, Inst Mech, Beijing, Peoples R China. ; Zheng, GN (corresponding author), Univ Chinese Acad Sci, Sch Engn, 15 Beisihuanxi Rd, Beijing 100190, Peoples R China.
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/92596]
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.{Lu, Weishuang, Zheng, Guannan} Chinese Acad Sci, Inst Mech, Beijing, Peoples R China 2.{Zheng, Guannan} Univ Chinese Acad Sci, Sch Engn, Beijing, Peoples R China 3.{Zheng, Guannan} Univ Chinese Acad Sci, Sch Engn, 15 Beisihuanxi Rd, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Lu WS,Zheng GN. Passive control on deep cavity noise at subsonic speeds by leading-edge grooves[J]. JOURNAL OF VIBRATION AND CONTROL,2023.
APA	陆维爽,&郑冠男.(2023).Passive control on deep cavity noise at subsonic speeds by leading-edge grooves.JOURNAL OF VIBRATION AND CONTROL.
MLA	陆维爽,et al."Passive control on deep cavity noise at subsonic speeds by leading-edge grooves".JOURNAL OF VIBRATION AND CONTROL (2023).