On the Birth of Stall Cells on Airfoils

Rodríguez Álvarez, Daniel y Theofilis, Vassilios (2011). On the Birth of Stall Cells on Airfoils. "Theoretical and Computational Fluid Dynamics", v. 25 (n. 1-4); pp. 105-117. ISSN 0935-4964. https://doi.org/10.1007/s00162-010-0193-7.


Título: On the Birth of Stall Cells on Airfoils
  • Rodríguez Álvarez, Daniel
  • Theofilis, Vassilios
Tipo de Documento: Artículo
Título de Revista/Publicación: Theoretical and Computational Fluid Dynamics
Fecha: 2011
Volumen: 25
Palabras Clave Informales: Stall cells – Flow topology – Global flow instability
Escuela: E.T.S.I. Aeronáuticos (UPM) [antigua denominación]
Departamento: Motopropulsión y Termofluidodinámica [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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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 topology, 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.

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ID de Registro: 10448
Identificador DC: http://oa.upm.es/10448/
Identificador OAI: oai:oa.upm.es:10448
Identificador DOI: 10.1007/s00162-010-0193-7
URL Oficial: http://www.springerlink.com/content/eul4340pm655446j/
Depositado por: Memoria Investigacion
Depositado el: 05 Mar 2012 10:42
Ultima Modificación: 20 Abr 2016 18:39
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