Structural/acoustic interaction in air-conditioning ducts in the presence of mean flow

Publication Type:
Conference Proceeding
Proceedings of the 23rd International Conference on Noise and Vibration Engineering, ISMA, 1998, pp. 809 - 816
Issue Date:
Filename Description Size
ISMA 23.pdfPublished version139.19 kB
Adobe PDF
Full metadata record
The finite element method is applied to the modelling of noise breakout from air-conditioning ducts which are rectangular in cross-section and lined with a bulk reacting sound absorbent. Mean flow in the central airway is also included in the model. An eigenvalue formulation is employed to couple the acoustic pressure field inside the duct to the displacement of the duct walls. Numerical predictions for the axial wavenumbers of the first "structural" and "acoustic" modes are examined both with and without mean flow.
Please use this identifier to cite or link to this item: