Abstract
We study the growth of azimuthally-periodic perturbations in the boundary-layer on axisymmetric geometries with concave flare using an input-output analysis. The global linear system is constructed using an unstructured finite-volume discretization of the compressible Navier-Stokes equations linearized in conserved variables. The global input-output analysis of the flared geometries identifies the most amplified steady perturbations downstream as azimuthally-periodic streaks caused due to local centrifugal (Görtler-type) instability. Analysis of perturbations with different azimuthal wavenumbers shows that the flow selectively amplifies a range of wavenumbers. Predictions from the I/O analysis are compared with data from direct numerical simulations.
Original language | English (US) |
---|---|
Title of host publication | AIAA AVIATION 2020 FORUM |
Publisher | American Institute of Aeronautics and Astronautics Inc, AIAA |
ISBN (Print) | 9781624105982 |
DOIs | |
State | Published - 2020 |
Event | AIAA AVIATION 2020 FORUM - Virtual, Online Duration: Jun 15 2020 → Jun 19 2020 |
Publication series
Name | AIAA AVIATION 2020 FORUM |
---|---|
Volume | 1 PartF |
Conference
Conference | AIAA AVIATION 2020 FORUM |
---|---|
City | Virtual, Online |
Period | 6/15/20 → 6/19/20 |
Bibliographical note
Funding Information:This work was sponsored by the Office of Naval Research under grant number N00014-19-2037 and Air Force Office of Scientific Research (AFSOR) through grant number FA9550-17-1-0250. The views and conclusions contained herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsements,