Proceedings of the 27th International Conference on Noise and Vibration Engineering, ISMA2016 & USD2016 vol:27
ISMA 2016 location:Leuven date:19-21 September 2016
An important problem in the transmission of the sound is the noise due to the pressure fluctuations of a turbulent
boundary layer (TBL). The action of the stochastic pressure distribution associated with the turbulence
provides the driving force to excite the underlying structure, generating vibration and noise, and therefore,
producing acoustic radiation into a back cavity enclosed by the boundary surface. In the following paper, the flow-induced noise in a cavity-plate system is analysed by using a Generalized Corcos model, recently developed by the authors. Analytical method is used to predict the noise transmitted into a rectangular cavity by a flexible plate driven on one side by a stationary TBL. The plate acceleration power spectral density and the interior sound pressure level are provided without the need for computationally costly numerical integration.
Results show how the different decay rates of the Generalized Corcos model at low-wavenumber affect the predictions and allow positioning the novel model with respect to other well-established models.