Optimal growth of linear perturbations in low pressure turbine flows

Sharma, Atul S. and Abdessemed, Nadir and Sherwin, Spencer and Theofilis, Vassilios (2008). Optimal growth of linear perturbations in low pressure turbine flows. In: "IUTAM Symposium on Flow Control and MEMS", 19/09/2006-22/09/2006, London, UK. ISBN 978-1-4020-6857-7.

Description

Title: Optimal growth of linear perturbations in low pressure turbine flows
Author/s:
  • Sharma, Atul S.
  • Abdessemed, Nadir
  • Sherwin, Spencer
  • Theofilis, Vassilios
Item Type: Presentation at Congress or Conference (Article)
Event Title: IUTAM Symposium on Flow Control and MEMS
Event Dates: 19/09/2006-22/09/2006
Event Location: London, UK
Title of Book: Proceedings of the IUTAM Symposium held at the Royal Geographical Society
Date: 2008
ISBN: 978-1-4020-6857-7
Volume: 7
Subjects:
Freetext Keywords: Transition - transient growth - linear stability analysis - singular value analysis - Arnoldi method - spectral/hp element method
Faculty: E.T.S.I. Aeronáuticos (UPM)
Department: Motopropulsión y Termofluidodinámica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

This paper presents a numerical algorithm for the linearized flow initial value problem involving complex geometries where analytical solution is impossible. The method centres around the calculation of an eigenvalue problem involving the linearised flow and its spatial adjoint, and yields the flow perturbations that grow the most in a prescribed time, the magnitude of that growth and the perturbations after the growth has occurred. Previous work has shown that classical stability analysis of flow past a low-pressure turbine blade gives only stable eigenvalues, which cannot explain transition to turbulence in this flow. The inital value problem for this fan blade is presented and demonstrates significant perturbation growth, indicating that this growth may be the facilitator for transition in this case.

More information

Item ID: 4714
DC Identifier: http://oa.upm.es/4714/
OAI Identifier: oai:oa.upm.es:4714
Official URL: http://www.springerlink.com/content/u82n37t1141m5171/
Deposited by: Memoria Investigacion
Deposited on: 28 Oct 2010 08:29
Last Modified: 20 Apr 2016 13:49
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