Acoustic damping performance of coupled Helmholtz resonators with a sharable perforated sidewall in the presence of grazing flow
Sign Up to like & getrecommendations! Published in 2020 at "Aerospace Science and Technology"
DOI: 10.1016/j.ast.2019.105573
Abstract: Abstract Helmholtz resonators are widely used in gas turbines and aeroengines, because of its simple structure and high noise damping. To broaden its effective frequency range, two or more Helmholtz resonators could be applied. In… read more here.
Keywords: presence grazing; damping performance; grazing flow; helmholtz resonators ... See more keywords
Investigation of straightforward impedance eduction method on single-degree-of-freedom acoustic liners
Sign Up to like & getrecommendations! Published in 2018 at "Chinese Journal of Aeronautics"
DOI: 10.1016/j.cja.2018.08.014
Abstract: Abstract In order to address the current aircraft noise problem, the knowledge of impedance of acoustic liners subjected to high-intensity sound and grazing flow is of crucial importance to the design of high-efficiency acoustic nacelles.… read more here.
Keywords: straightforward impedance; grazing flow; eduction method; impedance ... See more keywords
Acoustic impedance of perforated plates in the presence of fully developed grazing flow
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DOI: 10.1016/j.jsv.2020.115547
Abstract: Abstract The perforated components are widely used in the intake and exhaust mufflers. The coupling between instable shear layer and acoustic fluctuation has a significant influence on the acoustic impedance of perforated components. To obtain… read more here.
Keywords: impedance perforated; perforated plates; grazing flow; impedance ... See more keywords
The acoustic performance of a dual Helmholtz resonators system in the presence of a grazing flow
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DOI: 10.1177/1475472x221150175
Abstract: Helmholtz resonators (HR) are widely used in aero-engine systems for noise reduction. By connecting a pair of HRs in series (neck-cavity-neck-cavity), a dual HRs system is formed. This study investigated the influence of neck length,… read more here.
Keywords: system; dual hrs; grazing flow; helmholtz resonators ... See more keywords