Service interruption on Monday 11 July from 12:30 to 13:00: all the sites of the CCSD (HAL, EpiSciences, SciencesConf, AureHAL) will be inaccessible (network hardware connection).
Skip to Main content Skip to Navigation
Journal articles

Global stability of swept flow around a parabolic body: Connecting attachment-line and crossflow modes

Abstract : The global linear stability of a three-dimensional compressible flow around a yawed parabolic body of infinite span is investigated using an iterative eigenvalue method in conjunction with direct numerical simulations. The computed global spectrum shows an unstable branch consisting of three-dimensional boundary layer modes whose amplitude distributions exhibit typical characteristics of both attachment-line and crossflow modes. In particular, global eigenfunctions with smaller phase velocities display a more pronounced structure near the stagnation line, reminiscent of attachment-line modes while still featuring strong crossflow vortices further downstream. This analysis establishes a link between the two prevailing instability mechanisms on a swept parabolic body which, so far, have only been studied separately and locally. A parameter study shows maximum modal growth for a spanwise wavenumber of ß = 0.213, suggesting a preferred disturbance length scale in the sweep direction. © 2008 Cambridge University Press.
Complete list of metadata

Cited literature [16 references]  Display  Hide  Download

https://hal-polytechnique.archives-ouvertes.fr/hal-01022801
Contributor : Denis Roura Connect in order to contact the contributor
Submitted on : Thursday, July 17, 2014 - 1:41:29 PM
Last modification on : Monday, July 27, 2020 - 1:00:05 PM
Long-term archiving on: : Thursday, November 20, 2014 - 6:13:31 PM

File

S0022112008002851a.pdf
Publisher files allowed on an open archive

Identifiers

Collections

Citation

C.J. Mack, Peter J. Schmid, J.L. Sesterhenn. Global stability of swept flow around a parabolic body: Connecting attachment-line and crossflow modes. Journal of Fluid Mechanics, Cambridge University Press (CUP), 2008, 611 (september), pp.205-214. ⟨10.1017/s0022112008002851⟩. ⟨hal-01022801⟩

Share

Metrics

Record views

393

Files downloads

253