Prediction of Turbulent Boundary Layer Induced Noise in the Cabin of a BWB Aircraft

Date

2012

Authors

Rocha, Joana
Suleman, Afzal
Lau, Fernando

Journal Title

Journal ISSN

Volume Title

Publisher

Shock and Vibration

Abstract

This paper discusses the development of analytical models for the prediction of aircraft cabin noise induced by the external turbulent boundary layer (TBL). While, in previous works, the contribution of an individual panel to the cabin interior noise was considered, here, the simultaneous contribution of multiple flow-excited panels is analyzed. Analytical predictions are presented for the interior sound pressure level (SPL) at different locations inside the cabin of a Blended Wing Body (BWB) aircraft, for the frequency range 0–1000 Hz. The results show that the number of vibrating panels significantly affects the interior noise levels. It is shown that the average SPL, over the cabin volume, increases with the number of vibrating panels. Additionally, the model is able to predict local SPL values, at specific locations in the cabin, which are also affected with by number of vibrating panels, and are different from the average values.

Description

Keywords

Turbulent boundary layer, aircraft cabin noise prediction, fuselage panels

Citation

Rocha J., Suleman A. & Lau, F. (2012). Prediction of Turbulent Boundary Layer Induced Noise in the Cabin of a BWB Aircraft. Shock and Vibration, 19(4), 693-705. http://dx.doi.org/10.3233/SAV-2011-0660