Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Prediction of aerodynamic noise generated by cylinders in uniform flow using OpenFOAM
Submission Author:
Julio Victor Vieira Martins Chadlvski , SC , Brazil
Co-Authors:
Julio Victor Vieira Martins Chadlvski, Filipe Dutra da Silva
Presenter: Filipe Dutra da Silva
doi://10.26678/ABCM.COBEM2021.COB2021-1128
Abstract
Airframe noise is one of the main components of aircraft noise, especially during the approach procedure. This component is generated by the interaction of flow with aircraft elements such as high lift devices and landing gears. In this sense, the use of numerical tools became interesting for the design process as well as providing complementary data to experiments, such as flow field data in regions where measurements are difficult. The sound generation is usually computed by means of time-dependent simulations of the turbulent flow field, whereas the propagation can be considered analytically, by using acoustic analogies. The objective of this work is to build and validate a simulation model for the prediction of generated from the flow over blunt bodies, using the open-source code OpenFOAM coupled with acoustic prediction codes available in the literature. Some well-known benchmark cases were selected: an isolated cylinder and tandem cylinders in uniform flow. Three-dimensional incompressible Unsteady Reynolds Averaged Navier-Stokes simulations were conducted using the SST turbulence model. The acoustic field is computed using both Curle’s analogy and Ffowcs-Williams and Hawkings analogy with permeable surface formulation. The results of the simulations, both the flow and the acoustic field, are compared with experimental data available in the literature. Mean flow results show reasonable agreement with the reference experimental data. For the acoustic field, numerical results showed good agreement with experimental data for the tandem cylinder case, while presenting higher discrepancies relative to experiments for the isolated cylinder case.
Keywords
Airframe noise, Computational aeroacoustics, OpenFOAM
