Journal
PHYSICS OF FLUIDS
Volume 34, Issue 9, Pages -Publisher
AIP Publishing
DOI: 10.1063/5.0100187
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Funding
- National Natural Science Foundation of China [11974067]
- Natural Science Foundation Project of CQ CSTC [cstc2019jcyj-msxmX0145]
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This study achieved an ultra-broadband absorber with outstanding thermal convection performance in a fluid environment, which can reduce noise and support heat transfer simultaneously.
It is desired to achieve broadband noise reduction while supporting heat and fluids transmission simultaneously. However, attenuating sound energy with simultaneously achieving excellent heat-transferring performance in a fluid environment has yet to be explored. Here, we demonstrate an ultra-broadband absorber with outstanding thermal convection under a fluid environment, whose thickness is only lambda/15 (lambda is the airborne wavelength). By linearly extending the embedded apertures, the silencer can achieve sound absorption in the range of 455-585 Hz and can block more than 90% of sound energy in the ultra-broadband range of 455-1600 Hz. In addition, the outstanding thermal convection performance of the metamaterial absorber is experimentally demonstrated.
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