Eventos Anais de eventos
DINAME 2023
XIX International Symposium on Dynamic Problems of Mechanics
Dynamic Modes Decomposition of The Transonic Flow Around a Cylinder
Submission Author:
Guilherme Mendes Santana , DF
Co-Authors:
Guilherme Mendes Santana, Adriano Todorovic Fabro, Roberto Miserda
Presenter: Guilherme Mendes Santana
doi://10.26678/ABCM.DINAME2023.DIN2023-0118
Abstract
This work aims at investigating the Dynamic Modes Decomposition as a tool to generate a Reduced-Order Model that captures adequately the noise generated by the transonic flow past a cylinder. This case was chosen because although it is relatively simple, it contains interesting dynamic features such as the wake and the acoustic field upwind of the cylinder. The extracted dynamic modes showed that the acoustic field can be decomposed as acoustic multipoles, and the decomposition of the wake revealed structures consistent with the literature. The reconstruction of the flow field with the projection of the pressure snapshots on the left singular vectors had a better agreement with the original time series, when compared to the reconstruction with DMD modes, but both methods were capable of properly capturing the frequency of the pressure fluctuations.
Keywords
reduced order model, Computational aeroacoustics, Transonic Flow, dynamic modes decomposition
