Global Mode Analysis of Axisymmetric Bluff-Body Wakes: Stabilization by Base Bleed Articles uri icon

publication date

  • December 2009

start page

  • 114102

issue

  • 11

volume

  • 21

international standard serial number (ISSN)

  • 1070-6631

electronic international standard serial number (EISSN)

  • 1089-7666

abstract

  • The flow around a slender body with a blunt trailing edge is unstable in most situations of interest. Usually the flow instabilities are generated within the wake behind the bluff body, inducing fluctuating forces and introducing the possibility of resonance mechanisms with modes of the structure. Base bleed is a simple and well-known means of stabilizing the wake. In the present research, we investigate the global instability properties of the laminar-incompressible flow that develops behind a cylinder with sharp edges and axis aligned with the free stream using a spectral domain decomposition method....