Aeroacoustic Imaging Experiments of Airframe Noise in Lined Wall   Closed-Section Wind Tunnel

doi:10.1061/(ASCE)AS.1943-5525.0000422

CORC > 北京大学 > 工学院

	Aeroacoustic Imaging Experiments of Airframe Noise in Lined Wall Closed-Section Wind Tunnel
	Chen, Bao ; Wei, Qingkai ; Shao, Tianshuang ; Li, Yuanshou ; Huang, Xun
刊名	JOURNAL OF AEROSPACE ENGINEERING
	2015
关键词	Closed-section wind tunnel Liner Microphone array Airframe noise MICROPHONE ARRAY LANDING GEAR LOCALIZATION ALGORITHM
DOI	10.1061/(ASCE)AS.1943-5525.0000422
英文摘要	Acoustic imaging is an indispensable experimental aid in the design of silent aircraft. In this work, acoustic imaging is performed in a classical closed-section wind tunnel that has been extensively modified using specifically designed liners on the walls of the test section. The details of the associated acoustic modification and the aeroacoustic imaging method are introduced in this paper. The acoustic test performance is carefully evaluated by examining background noise reductions and acoustic beamforming results. The experimental outcomes suggest that the proposed acoustic modification could suppress background noise by 5 dB at 40-80 m/s test flow speeds. The beamforming results clearly identify the dominant airframe noise sources at landing gears and high-lift devices. The experimental results agree fairly well with the preceding computational and empirical predictions. The proposed acoustic imaging technique has been shown to be an effective experimental technique in identifying airframe noise sources. In addition, the acoustic treatments developed in this paper could be considered in extending the aeroacoustic capabilities of existing closed-section wind tunnels. (C) 2014 American Society of Civil Engineers.; National Natural Science Foundation of China [11172007, 11322222]; SCI(E); EI; ARTICLE; weiqingkai@pku.edu.cn; 4; 28
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/418917]
专题	工学院
推荐引用方式 GB/T 7714	Chen, Bao,Wei, Qingkai,Shao, Tianshuang,et al. Aeroacoustic Imaging Experiments of Airframe Noise in Lined Wall Closed-Section Wind Tunnel[J]. JOURNAL OF AEROSPACE ENGINEERING,2015.
APA	Chen, Bao,Wei, Qingkai,Shao, Tianshuang,Li, Yuanshou,&Huang, Xun.(2015).Aeroacoustic Imaging Experiments of Airframe Noise in Lined Wall Closed-Section Wind Tunnel.JOURNAL OF AEROSPACE ENGINEERING.
MLA	Chen, Bao,et al."Aeroacoustic Imaging Experiments of Airframe Noise in Lined Wall Closed-Section Wind Tunnel".JOURNAL OF AEROSPACE ENGINEERING (2015).