Flow aeroacoustic damping using coupled mechanical electrical impedance in lined pipeline  

作　　者：陈勇 黄奕勇 陈小前 白玉铸 谭晓栋 

机构地区：[1]College of Aerospace Science and Engineering, National University of Defense Technology [2]Department of Electronic Technology, Officer’s College of CAPF

出　　处：《Chinese Physics B》2015年第5期410-414,共5页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.11404405,91216201,51205403,and 11302253)

摘　　要：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.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.

关 键 词：aeroacoustics mechanical-electrical impedance wave propagation uniform flow 

分 类 号：O42[理学—声学]