Volume 9, 2017Progress in Flight Physics
|Page(s)||451 - 480|
|Section||Stability, transition, and turbulence|
|Published online||20 June 2017|
Investigation on the wake flow instability behind isolated roughness elements on the forebody of a blunt generic reentry capsule
German Aerospace Center (DLR)
Institute of Aerodynamics and Flow Technology
10 Bunsenstr., Göttingen 37073, Germany
Numerical results on modal disturbance growth in the wake §ow downstream of a roughness element submerged in the boundary layer of a typical reentry capsule at an angle of attack are presented. Laminar base §ow computations were conducted for different roughness heights and planform shapes. The modal instability characteristics of the wake §ow were studied by spatial two-dimensional (2D) eigenvalue analysis. For all cases considered, the varicose wake modes are most amplified in terms of maximum N -factors, with the cylindrical roughness element being the most effective shape.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.