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
Numerical investigation on an array of Helmholtz resonators for the reduction of micro-pressure waves in modern and future high-speed rail tunnel systems
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Sound and Vibration"
DOI: 10.1016/j.jsv.2017.04.022
Abstract: Abstract Previous research has proposed that an array of Helmholtz resonators may be an effective method for suppressing the propagation of pressure and sound waves, generated by a high-speed train entering and moving in a… read more here.
Keywords: array; tunnel; helmholtz resonators; array helmholtz ... See more keywords
Optimising the acoustic damping of multiple Helmholtz resonators attached to a thin annular duct
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Sound and Vibration"
DOI: 10.1016/j.jsv.2018.12.023
Abstract: Abstract Helmholtz resonators (HRs) are widely used to damp acoustic oscillations, including in the combustors of aero-engines and power gas turbines where they damp thermoacoustic oscillations. The geometries of such combustors are often annular in… read more here.
Keywords: helmholtz resonators; annular duct; acoustic damping; thin annular ... See more keywords
Interferences in locally resonant sonic metamaterials formed from Helmholtz resonators
Sign Up to like & getrecommendations! Published in 2019 at "Applied Physics Letters"
DOI: 10.1063/1.5092375
Abstract: The emergence of materials artificially designed to control the transmission of waves, generally called metamaterials, has been a hot topic in the field of acoustics for several years. The design of these metamaterials is usually… read more here.
Keywords: metamaterials formed; resonant sonic; control; locally resonant ... See more keywords
An acoustic absorbing metamaterial with multi-Helmholtz resonators at low-frequency underwater
Sign Up to like & getrecommendations! Published in 2021 at "Modern Physics Letters B"
DOI: 10.1142/s0217984921503978
Abstract: An ultra-thin waterborne acoustic metamaterial (AM), which is made of steel and composed of multi-Helmholtz resonators (MHRs), is proposed to achieve perfect sound absorption at low frequencies, which are generated around the resonance mode. The… read more here.
Keywords: low frequency; multi helmholtz; helmholtz resonators; sound absorption ... See more keywords
The acoustic performance of a dual Helmholtz resonators system in the presence of a grazing flow
Sign Up to like & getrecommendations! Published in 2023 at "International Journal of Aeroacoustics"
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
Acoustic Models for Cooled Helmholtz Resonators
Sign Up to like & getrecommendations! Published in 2017 at "AIAA Journal"
DOI: 10.2514/1.j055854
Abstract: Helmholtz resonators are commonly used to damp thermoacoustic oscillations in aeroengine and gas turbine combustors. In practice, the Helmholtz resonator is often maintained at a cooler temperature... read more here.
Keywords: acoustic models; models cooled; cooled helmholtz; helmholtz resonators ... See more keywords