Approaches to analytical solutions of laminar compressed free jets

Abstract

WE study here the effect of a uniform mass density time variation on a subsonic gas jet by generalizing the classical similarity hypothesis. Both plane and circular laminar jet evolutions are precisely established and compared. I. Laminar Jet Self-Preserving Region We are first interested in characterizing the behavior of the plane or axisymmetric laminar jet self-preserving region. The jet flow is well into the subsonic flow so that the gas mass density p is uniform in space and governed by the displacement of the pistons (see Fig. 1). Two characteristic times rule the flow evolution - the mass density variation time scale