ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Flow aeroacoustic damping using coupled mechanical–electrical impedance in lined pipeline |
Chen Yong (陈勇)a, Huang Yi-Yong (黄奕勇)a, Chen Xiao-Qian (陈小前)a, Bai Yu-Zhu (白玉铸)b, Tan Xiao-Dong (谭晓栋)b |
a College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China; b Department of Electronic Technology, Officer's College of CAPF, Chengdu 610213, China |
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Abstract We report a new noise-damping concept which utilizes a coupled mechanical–electrical acoustic impedance to attenuate an aeroacoustic wave propagating in a moving gas confined by a cylindrical pipeline. An electrical damper is incorporated to the mechanical impedance, either through the piezoelectric, electrostatic, or electro-magnetic principles. Our numerical study shows the advantage of the proposed methodology on wave attenuation. With the development of the micro-electro-mechanical system and material engineering, the proposed configuration may be promising for noise reduction.
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Received: 12 August 2014
Revised: 24 November 2014
Accepted manuscript online:
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PACS:
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43.28.Bj
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(Mechanisms affecting sound propagation in air, sound speed in the air)
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43.28.Py
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(Interaction of fluid motion and sound, Doppler effect, and sound in flow ducts)
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43.50.Nm
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(Aerodynamic and jet noise)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11404405, 91216201, 51205403, and 11302253). |
Corresponding Authors:
Chen Yong
E-mail: literature.chen@gmail.com
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About author: 43.28.Bj; 43.28.Py; 43.50.Nm |
Cite this article:
Chen Yong (陈勇), Huang Yi-Yong (黄奕勇), Chen Xiao-Qian (陈小前), Bai Yu-Zhu (白玉铸), Tan Xiao-Dong (谭晓栋) Flow aeroacoustic damping using coupled mechanical–electrical impedance in lined pipeline 2015 Chin. Phys. B 24 054302
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