Low-frequency still-air acoustic inertia of inclined circular aperture in an infinite flat plate of finite thickness

Su，Jialin1; Chen，Hongwei2; Yang，Dong2

2024-02-03

10.1016/j.jsv.2023.118119

Journal of Sound and Vibration   影响因子和分区

0022-460X

1095-8568

The acoustic inertia of the canonical configuration of inclined circular aperture(s) in a finite-thickness plate at the low frequency limit is investigated under the inviscid still-air condition. A hybrid approach combining modal expansion and boundary element method is applied to calculate the effective length of the aperture as a quantitative characterisation of its acoustic inertia. These calculations, covering different inclination angles up to 75°, are performed for a single isolated aperture with a selected range of plate thickness and the periodic aperture arrays of aligned and staggered arrangements with a selected range of aperture spacing respectively. The results are validated by the simulations carried out with the commercial software COMSOL. The parametric studies of geometric dimensions included in this work provide representative results for typical acoustic related engineering applications of finite-length inclined apertures. A link for access to the MATLAB programmes implementing the calculations is provided for interested readers. As an example of application, the hybrid method described in this work is used for the acoustic modelling of a representative multi-perforated liner studied in the literature for the problem of thermo-acoustic instability. The results compared well against those obtained from the Computational Fluid Dynamics simulations reported in the literature.

Effective length Inclined aperture Perforated liner Transfer impedance

SCI ; EI

英语

其他

ENGINEERING

2-s2.0-85174725410

Scopus

1.Department of Aeronautical and Automotive Engineering,Loughborough University,Loughborough,Leicestershire,LE11 3NT,United Kingdom
2.Department of Mechanics and Aerospace Engineering,Southern University of Science and Technology,Shenzhen,Guangdong Province,518055,China

Su，Jialin,Chen，Hongwei,Yang，Dong. Low-frequency still-air acoustic inertia of inclined circular aperture in an infinite flat plate of finite thickness[J]. Journal of Sound and Vibration,2024,570.

Su，Jialin,Chen，Hongwei,&Yang，Dong.(2024).Low-frequency still-air acoustic inertia of inclined circular aperture in an infinite flat plate of finite thickness.Journal of Sound and Vibration,570.

Su，Jialin,et al."Low-frequency still-air acoustic inertia of inclined circular aperture in an infinite flat plate of finite thickness".Journal of Sound and Vibration 570(2024).