Observatorio de I+D+i UPM

Memorias de investigación
Capítulo de libro:
Instability study of the wake behind a discrete roughness element in a hypersonic boundary-layer
Año:2014
Áreas de investigación
  • Mecánica de fluidos,
  • Ingeniería aeronaútica
Datos
Descripción
The linear instability induced by an isolated roughness element in a boundary-layer at Mach 6 has been analysed through spatial BiGlobal and three-dimensional parabolised (PSE-3D) stability analyses. It is important to understand transition in this flow regime since the process can be slower than in incompressible flow and is critical to prediction of local heat loads on next-generation flight vehicles. The results show that the roughness element, with a height of the order of the boundary-layer displacement thickness, generates an convectively unstable wake where different instability modes develop. Furthermore, at this high Mach number, boundary-layer modes develop at high frequencies and are also covered here. Important discrepancies are observed between BiGlobal and PSE-3D predictions, mainly for the roughness-induced wake modes. Results are in qualitative agreement with a full Navier-Stokes receptivity study of the same flow.
Internacional
Si
DOI
10.1007/978-3-319-06260-0_14
Edición del Libro
Editorial del Libro
Springer
ISBN
978-3-319-06259-4
Serie
5980
Título del Libro
Instability and Control of Massively Separated Flows
Desde página
1
Hasta página
6
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Pedro Paredes Gonzalez (UPM)
  • Autor: Nicola De Tullio (Imperial College Longon)
  • Autor: Neil D. Sandham (University of Southampton)
  • Autor: Vassilios Theofilis (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Departamento: Mecánica de Fluidos y Propulsión Aeroespacial
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