Acoustic Characterization of a Helmholtz Resonator Under Grazing Flow Conditions Using a Hybrid Methodology
(2013) 19th AIAA/CEAS Aeroacoustics Conference — Location: Berlin, Germany (27.May.2013)
Files
paper_aiaa_2013.pdf
Restricted Access - Adobe PDF
- 408.29 KB
Details
- Authors
- Abstract
- A hybrid methodology is applied to characterize a Helmholtz resonator under a grazing flow. In a first step, the mean flow profile is obtained from a RANS simulation. The acoustic field and its interaction with the hydrodynamic field are calculated in a second step, by solving the linearized Navier-Stokes equations. The impedance of the Helmholtz resonator is obtained using the in-situ measurement technique. Because the method relies on the use of linear governing equations, the validity of the results is limited to the linear regime. Within this region, the computed reactance shows good agreement with an analytical model and experimental observations. Preliminary computations of the resistance show the potential of the method, but the optimal position of the facing sheet measurement point remains an open question.
- Affiliations
Citations
Denayer, H., De Roeck, W., Desmet, W., & Toulorge, T. (2013). Acoustic Characterization of a Helmholtz Resonator Under Grazing Flow Conditions Using a Hybrid Methodology. 19th AIAA/CEAS Aeroacoustics Conference 2013, 34th AIAA Aeroacoustics Conference : Berlin, Germany, 27 - 29 May 2013. Published. 19th AIAA/CEAS Aeroacoustics Conference, Berlin, Germany. https://doi.org/10.2514/6.2013-2076