On instability and structural sensitivity of incompressible laminar separation bubbles in a flat-plate boundary layer

Rodriguez, Daniel y Theofilis, Vassilios (2008). On instability and structural sensitivity of incompressible laminar separation bubbles in a flat-plate boundary layer. En: "38th Fluid Dynamics Conference and Exhibit, (AIAA)", 23/06/2008-26/06/2008, Seattle, EE UU.

Descripción

Título: On instability and structural sensitivity of incompressible laminar separation bubbles in a flat-plate boundary layer
Autor/es:
  • Rodriguez, Daniel
  • Theofilis, Vassilios
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: 38th Fluid Dynamics Conference and Exhibit, (AIAA)
Fechas del Evento: 23/06/2008-26/06/2008
Lugar del Evento: Seattle, EE UU
Título del Libro: Proceedings of 38th Fluid Dynamics Conference and Exhibit, (AIAA)
Fecha: 2008
Materias:
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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Resumen

The separation of the laminar boundary layer under an adverse pressure gradient and its subsequent turbulent re-attachment, forming what is known as a "laminar separation bubble", is a technological problem of primary significance, with applications in aircraft wings, turbine blades and wind turbines. Despite extensive studies during the last century, many questions related to the appearance, structure and instability properties of laminar separation bubbles, still remain open. Some of these questions are first referred to in the works of Gault,1 and McCullough and Gault,2, 3 in which separation bubbles are classified according to their stream wise extension as \short" or \long". Tani4 indicated classification conditions but it was not until Gaster5 that a universal classification criterion was proposed, based on the free stream velocity, Us, the momentum thickness at separation, Os, and the ensuing momentum-thickness Reynolds number, Res .Following this classification, several investigators have proposed analogous criteria;6{8 however, the physical origin of a classification is not fully understood, and a generally accepted threshold for the change from one kind of bubble to the other does not exist presently.

Más información

ID de Registro: 4265
Identificador DC: http://oa.upm.es/4265/
Identificador OAI: oai:oa.upm.es:4265
URL Oficial: http://www.aiaa.org/index.cfm
Depositado por: Memoria Investigacion
Depositado el: 27 Sep 2010 08:23
Ultima Modificación: 22 Sep 2014 10:14
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