Memorias de investigación
Research Publications in journals:
On the Birth of Stall Cells on Airfoils
Year:2011
Research Areas
  • Fluid mechanics,
  • Mechanical aeronautics and naval engineering
Information
Abstract
Critical point theory asserts that two-dimensional topologies are defined as degeneracies and any three-dimensional disturbance of a two-dimensional flow will lead to a new three-dimensional flowfield topol- ogy, regardless of the disturbance amplitude. Here, the topology of the composite flowfields reconstructed by linear superposition of the two-dimensional flow around a stalled airfoil and the leading stationary three- dimensional global eigenmode has been studied. In the conditions monitored the two-dimensional flow is steady and laminar and is separated over a fraction of the suction side, while the amplitudes considered in the linear superposition are small enough for the linearization assumption to be valid. The multiple topological bifurcations resulting have been analysed in detail; the surface streamlines generated by the leading stationary global mode of the separated flow have been found to be strongly reminiscent of the characteristic stall cells, observed experimentally on airfoils just beyond stall in both laminar and turbulent flow.
International
Si
JCR
Si
Title
Theoretical and Computational Fluid Dynamics
ISBN
0935-4964
Impact factor JCR
1,127
Impact info
Volume
25 (1-4)
10.1007/s00162-010-0193-7
Journal number
From page
105
To page
117
Month
SIN MES
Ranking
Participants
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Mecánica de Fluidos Computacional
  • Departamento: Motopropulsión y Termofluidodinámica