Pairwise nonlinear interactions of tollmien-schlichting waves in flows of the boundary-layer type

For a flow of the boundary-layer type, the method of a phase plane is used to investigate the joint evolution of a pair of Tollmien–Schlichting waves as a function of the R numbers and the frequencies.Translated from Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza, No. 2, pp. 33–37, March–April, 1977.