Perturbations of finite amplitude in a boundary layer

The nonlinear development of Tollmien-Schlichting waves in a boundary layer is studied taking account of the nonparallel character of the mean flow. The investigation is made using a modified Stuart-Watson method 1–3]. A comparison is made with results obtained with the usual quasiparallel approach.Translated from Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza, No. 1, pp. 150–153, January–February, 1976.