Effect of Aspect Ratio on the Three-Dimensional Global Instability Analysis of Incompressible Open Cavity Flows

Meseguer Garrido, Fernando and Vicente Buendia, Javier de and Valero Sánchez, Eusebio and Theofilis, Vassilios (2011). Effect of Aspect Ratio on the Three-Dimensional Global Instability Analysis of Incompressible Open Cavity Flows. In: "6th AIAA THeoretical Fluid Mechanics Conference", 27/06/2011 - 30/06/2011, Honolulu, Hawaii, USA. ISBN 978-1-62410-144-1. pp..

Description

Title: Effect of Aspect Ratio on the Three-Dimensional Global Instability Analysis of Incompressible Open Cavity Flows
Author/s:
  • Meseguer Garrido, Fernando
  • Vicente Buendia, Javier de
  • Valero Sánchez, Eusebio
  • Theofilis, Vassilios
Item Type: Presentation at Congress or Conference (Article)
Event Title: 6th AIAA THeoretical Fluid Mechanics Conference
Event Dates: 27/06/2011 - 30/06/2011
Event Location: Honolulu, Hawaii, USA
Title of Book: Proceedings of 6th AIAA Theoretical Fluid Mechanics Conference
Date: 2011
ISBN: 978-1-62410-144-1
Subjects:
Faculty: E.U.I.T. Aeronáutica (UPM)
Department: Vehículos Aeroespaciales [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The stability analysis of open cavity flows is a problem of great interest in the aeronautical industry. This type of flow can appear, for example, in landing gears or auxiliary power unit configurations. Open cavity flows is very sensitive to any change in the configuration, either physical (incoming boundary layer, Reynolds or Mach numbers) or geometrical (length to depth and length to width ratio). In this work, we have focused on the effect of geometry and of the Reynolds number on the stability properties of a threedimensional spanwise periodic cavity flow in the incompressible limit. To that end, BiGlobal analysis is used to investigate the instabilities in this configuration. The basic flow is obtained by the numerical integration of the Navier-Stokes equations with laminar boundary layers imposed upstream. The 3D perturbation, assumed to be periodic in the spanwise direction, is obtained as the solution of the global eigenvalue problem. A parametric study has been performed, analyzing the stability of the flow under variation of the Reynolds number, the L/D ratio of the cavity, and the spanwise wavenumber β. For consistency, multidomain high order numerical schemes have been used in all the computations, either basic flow or eigenvalue problems. The results allow to define the neutral curves in the range of L/D = 1 to L/D = 3. A scaling relating the frequency of the eigenmodes and the length to depth ratio is provided, based on the analysis results.

More information

Item ID: 13077
DC Identifier: http://oa.upm.es/13077/
OAI Identifier: oai:oa.upm.es:13077
Official URL: http://arc.aiaa.org/doi/book/10.2514/MTFC11
Deposited by: Memoria Investigacion
Deposited on: 04 Dec 2012 10:43
Last Modified: 22 Sep 2014 10:57
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