The development of localized disturbances, generated by periodic impulse lifting of three-dimensional surface in the flat plate boundary layer at Reδ1 > 400 is experimentally investigated. It is shown that a large amplitude surface lifting leads simultaneously to the formation of two types of perturbations in the boundary layer: longitudinal localized structures and two wave packets. Spatial development of oscillations at the central frequency of the wave packets is consistent with the linear theory of hydrodynamic stability.
Gilev VM and Kozlov VV. Excitation of the Tollmin-Schlichting waves in the boundary layer by a vibrator. Institute of Theoretical and Applied Mechanics, Siberian Division, Russian Academy of Sciences, Novosibirsk, 1983 (preprint no. 19-83).
2.
TuminAMFedorovAV. Excitation of instability waves in the boundary layer on a vibrating surface. Prikl Mekh Tech Fiz1983; 24: 72–79.
3.
Kazakov VA. Analysis of the formation of a turbulent spot in a laminar boundary layer. In: IUTAM symposium on laminar-turbulent transition, Japan, 1994, pp.189–196.
4.
ChernoraiVGGrekHRKatasonovMM, et al.Generation of localized perturbations by a vibrating surface. Teplofiz Aeromech2000; 7: 339–351.
5.
BoikoAVGrekGRDovgalAV, et al.The origination of turbulence in near-wall flows, Berlin Heidelberg New York: Springer, 2002.
6.
Morkovin MV. Bypass transition to turbulence and research desiderata, transition in turbines. NASA-CP-2386, 1984.
7.
VaughanNZakiT. Stability of zero-pressure-gradient boundary layer distorted by unsteady Klebanoff streaks. J Fluid Mech2011; 681: 116–153.
8.
Matsubara M, Takaichi K and Kenchi T. Experimental study of boundary layer transition subjected to weak free stream turbulence. In: IUTAM symposium on laminar-turbulent transition, Sweden, 2009, pp.277–282.
9.
ChernoraiVGSpiridonovANKatasonovMM, et al.Generation of perturbations by a localized vibrator in the boundary layer of a nonswept wing. J Appl Mech Technol Phys2001; 42: 765–772.
10.
GorevVNKatasonovMM. Origination and development of precursors on the fronts of streaky structures in the boundary layer on a nonswept wing. Thermophys Aeromech2004; 11: 391−403–391−403.
11.
AlfredssonPHKatasonovMMKozlovVV. Generation and development of “passive” disturbances in the Blasius boundary layer. Thepoph Aeromech2001; 8: 337–344.
12.
KatasonovMMParkSHSungHJ, et al.Instability of streaky structures in a Blasius boundary layer. Exp Fluids2005; 38: 363–371.
13.
Katasonov MM, Kozlov VV, Nikitin NV, et al. The emergence and development of localized disturbances in a circular pipe and boundary layer. Novosibirsk: Novosib. State Univ. RIC NSU, 2014 [in Russian].
14.
GasterM. On the effects-boundary-layer growth on flow stability. J Fluid Mech1974; 66: 465–480.
