| Abstract: | The excitation of a packet of near-subharmonic secondary perturbations by the periodic blowing-suction of fluid through a small wall section at the initial instant is studied. The packet is treated as a very simple model of a turbulent spot. The investigation is carried out for plane Poiseuille flow and a Blasius boundary layer. The results obtained are compared with the data of experiments and direct numerical simulation of turbulent spot flow.Moscow. Translated from Izvestiya Rossiiskoi Akademii Nauk, Mekhanika Zhidkosti i Gaza, No. 6, pp. 51–61, November–December, 1995. |
