| Abstract: | The problem of the origin and evolution of two-dimensional waves of unstable disturbances in the boundary layer on an airfoil
in the region of adverse pressure gradient in the preseparation flow region is solved numerically. The stability of the experimental
velocity profiles, including the inflected profiles, is studied. As a result of the calculations, the boundaries of the instability
region and the parameters of the maximally unstable disturbances (frequency, growth rate, wavelength, and propagation velocity)
are determined for each velocity profile. The characteristics obtained in the present work are in good agreement with the
real experimental parameters of instability waves.
Institute of Theoretical and Applied Mechanics, Siberian Division, Russian Academy of Sciences, Novosibirsk 630090. Translated
from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, Vol. 40, No. 1, pp. 126–132, January–February, 1999. |
