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EPTT 2020
12th Spring School on Transition and Turbulence
NUMERICAL INVESTIGATION OF THE FLOW-INDUCED NOISE IN A TURBULENT FLOW INSIDE AN HVAC DUCT
Submission Author:
Lucas de Souza Meira , MG
Co-Authors:
Lucas de Souza Meira, Francisco Souza
Presenter: Lucas de Souza Meira
doi://10.26678/ABCM.EPTT2020.EPT20-0063
Abstract
The present work aims to investigate the flow-induced noise generation in an turbulent pipe flow by means of Computational Fluid Dynamics. The flow behavior and noise production at a high Reynolds number internal flow are analyzed in a heating ventilation air-conditioned (HVAC) system. In order to develop the present analysis and to find the most accurate approach for this application, we evaluated different advective discretization schemes in the context of DES simulations. Comparisons are established with experimental data of benchmark cases, for which gauge pressure in specific regions, sound pressure level and velocity fields are evaluated. Simulations are performed using an in-house code, i.e. UNSCYFL3D, which was developed at the Federal University of Uberl\^{a}ndia and has been validated in several internal and external flows. By means of this work, we were able to find the most accurate setup parameters for such a problem. Reynolds Averaged Navier-Stokes turbulence models did not yield satisfactory results, whereas the Detached Eddy Simulation (DES) was found to produce much more accurate results, obviously at a higher computational cost. It is concluded that DES, along with the central difference scheme for the advection, is a viable approach for computational aeroacoustics for HVAC ducts.
Keywords
flow-induced noise, DES, HVAC system, Turbulence, Internal Flow
