Quasi-steady acoustic response of wall perforations subject to a grazing-bias flow combination

• Published in: Journal of sound and vibration Vol. 332; no. 7; pp. 1654 - 1673
• Main Authors: Tonon, D., Moers, E.M.T., Hirschberg, A.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.04.2013
• Subjects: Acoustics; Bias; Dampers; Impedance; Liners; Perforations; Sound; Walls

Well known examples of acoustical dampers are the aero-engine liners, the IC-engine exhaust mufflers, and the liners in combustion chambers. These devices comprise wall perforations, responsible for their sound absorbing features. Understanding the effect of the flow on the acoustic properties of a...