The Theory of Stability of Compres-sible Laminar Boundary Layers with Injection of a Foreign Gas

摘要

The stability theory of laminar boundary layers with regard to infinitesimal disturbances is extended to the case involving binary gas mixtures, as may occur when a different coolant is injected into the free stream (air) are given. The“viscous” solutions. The asymptotic solutions and the eigen-value problem are discussed. Based upon the “inviscid criterion”, it appears that a lighter coolant would result in a more stable laminar boundary layer than a heavier coolant, at least for subsonic free stream.