Imperial College London


Faculty of EngineeringDepartment of Aeronautics

Professor of Computational Fluid Mechanics



+44 (0)20 7594 5052s.sherwin Website




313BCity and Guilds BuildingSouth Kensington Campus






BibTex format

author = {Abdessemed, N and Sherwin, SJ and Theofilis, V},
title = {On unstable 2d basic states in low pressure turbine flows at moderate reynolds numbers},
year = {2004}

RIS format (EndNote, RefMan)

AB - Results are presented of BiGlobal stability analysis of incompressible flow over a row of T-106/300 Low Pressure Turbine blades. In particular the two- and three-dimensional stability of a two-dimensional steady state is investigated for Reynolds numbers below 915. Both structured and unstructured meshes have been used at different degrees of refinement, while variations of the polynomial order of the numerical methods in either approach have ensured numerical convergence. The analysis shows that the transition from steady to periodic flow takes place at a Reynolds number of Rec = 905 ± 10. The flow remains linearly stable to three-dimensional disturbances below Rec. The leading eigenvalues of three-dimensional BiGlobal eigenmodes of the LPT flow have been obtained in a range of Reynolds and spanwise wavenumber parameters. The two most interesting eigenmodes have been found to be related with the wake of the blade and the separated flow in the trailing-edge region on the suction side of the blade. © 2004 by the American Institute of Aeronautics and Astronautics, Inc.
AU - Abdessemed,N
AU - Sherwin,SJ
AU - Theofilis,V
PY - 2004///
TI - On unstable 2d basic states in low pressure turbine flows at moderate reynolds numbers
ER -