Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Analysis of the effect of perturbations imposed on the supersonic flow over a cylinder through direct numerical simulations
Submission Author:
Allan Rodrigo Souza , RJ
Co-Authors:
Allan Rodrigo Souza, Leonardo Santos de Brito Alves, Juan Carlos Assis da Silva, Rômulo Bessi Freitas
Presenter: Allan Rodrigo Souza
doi://10.26678/ABCM.COBEM2023.COB2023-1076
Abstract
The supersonic flow around a two-dimensional cylinder has been studied for many decades using direct numerical simulations to determine accurate steady-states. Linear and global stability analyses of these steady-states show the flow is modally stable, i.e. the time asymptotic behavior of small amplitude two-dimensional disturbances shows an exponential decay in time. On the other hand, a significant optimal non-modal disturbance energy growth has been recently observed at the shock. The present study aims disturb the shock in order to verify the realizability of the non-modal energy growth. This is done by rotating the cylinder wall in different ways after the flow has reached steady-state, which allows these disturbances to propagate upstream within the subsonic region between solid wall and shock and interact with the shock. Preliminary results indicate doing so changes the shock location but induces no sub-optimal energy growth.
Keywords
Aerodynamic Disturbances, Supersonic Flows, Oscillating Cylinder, DNS, Direct Numerical Simulation (DNS);
