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@article{Thomas:2018:10.2514/1.J056821,
author = {Thomas, C and Mughal, MS and Roland, H and Ashworth, R and Martinex-Cava, A},
doi = {10.2514/1.J056821},
journal = {AIAA Journal},
pages = {2157--2165},
title = {Effect of small surface deformations on the stability of Tollmien–Schlichting disturbances},
url = {http://dx.doi.org/10.2514/1.J056821},
volume = {56},
year = {2018}
}

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TY  - JOUR
AB  - The effect of a small Gaussian shaped deformation on the development and growth of Tollmien–Schlichting disturbances on an unswept airfoil is investigated. A broad range of gap depths and widths is modeled that can be sufficient to generate localized pockets of reverse flow. Boundary-layer profiles are computed using a Navier–Stokes solver, permitting a thorough investigation of all configurations considered. The linear stability of Tollmien–Schlichting waves is then examined using parabolized stability equations and linearized Navier–Stokes formulations, with the former method giving excellent agreement with the latter for all disturbances studied, including within separated boundary layers. Tollmien–Schlichting disturbances are amplified by deeper and wider gaps, with a correlation derived by relating the increase in the N factor with the gap dimensions and freestream Reynolds number.
AU  - Thomas,C
AU  - Mughal,MS
AU  - Roland,H
AU  - Ashworth,R
AU  - Martinex-Cava,A
DO  - 10.2514/1.J056821
EP  - 2165
PY  - 2018///
SN  - 0001-1452
SP  - 2157
TI  - Effect of small surface deformations on the stability of Tollmien–Schlichting disturbances
T2  - AIAA Journal
UR  - http://dx.doi.org/10.2514/1.J056821
UR  - https://arc.aiaa.org/doi/abs/10.2514/1.J056821
UR  - https://doi.org/10.2514/1.J056821
UR  - http://hdl.handle.net/10044/1/58804
VL  - 56
ER  -

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Dr Shahid Mughal

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