BibTex format
@inproceedings{Loh:2014,
author = {Loh, SA and Blackburn, HM and Sherwin, SJ},
title = {Transient growth in an airfoil separation bubble},
year = {2014}
}
Publications
Citation
RIS format (EndNote, RefMan)
TY - CPAPER
AB - In this work, transient growth in a laminar separation bubble in a low-to-moderate Reynolds number airfoil flow is investigated. Optimal two and three-dimensional initial perturbations are computed for the flow over a NACA 0012 airfoil at angle-of-attack α = 5° with chord based Re = 5 × 104. At this Reynolds number, the pressure surface boundary layer remains attached over the length of the airfoil while the suction surface boundary layer undergoes separation before becoming two-dimensionally unstable leading to periodic vortex shedding and reattachment. Transient growth analysis shows that this flow supports large energy growth for both two and three-dimensional perturbations. Optimal growth values and flow topologies show that two-dimensional mechanisms are the primary energy growth mechanisms. Upstream of vortex shedding, the primary growth mechanism appears to be the Orr mechanism while a separate mechanism appears to drive further energy growth downstream in the base flow shed vorticity.
AU - Loh,SA
AU - Blackburn,HM
AU - Sherwin,SJ
PY - 2014///
TI - Transient growth in an airfoil separation bubble
ER -