| Abstract: | The stability of periodic motion of a fluid in a planar channel was investigated experimentally. Two mechanisms of departure from stability of rectilinear motion — at high and low frequencies, respectively — were observed. The critical Reynolds number was found as a function of the pulsation frequency. The results of the quasistationary theoretical approach to the stability of periodic flows 1] agree with the experiment.Translated from Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza, No. 6, pp. 114–118, November–December, 1979.I thank G. F. Shaidurov, under whose guidance this work was carried out. |
