Experimental and computational investigation of coupled resonator–cavity systems
作者： S. Unnikrishnan Nair , C.D. Shete , A. Subramoniam , K.L. Handoo , C. Padmanabhan
DOI: 10.1016/J.APACOUST.2009.07.009
关键词:
摘要: Abstract Launch vehicle noise is broadband in nature and the transmitted into payload fairing reduced by treating its interior with an acoustic absorption layer. The latest generation fairings are made from composite material which offer poor attenuation at low frequencies. One possible solution for reducing frequency to use Helmholtz resonators tuned a few of dominant components, such as shell ring or first cavity modes fairing. paper presents simplified modelling approach numerical simulation coupled cavity–resonator system validated experiments. influence damping resonator volume fraction on performance, suppress axial mode cylindrical cavity, shown required significantly (more than 5 dB) suppressing established.
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