Viscous stability of compressible axisymmetric jets

Abstract

C of the viscous, spatial stability characteristics of a compressible axisymmetric jet are presented. The asymptotic solutions to the stability equations in regions of constant mean flow properties are developed and used as the boundary conditions for a numerical integration of the compressible stability equations in cylindrical coordinates. Increasing the Mach number is found .to stabilize the flow, as • is decreasing the Reynolds number. The helical mode is found to be more unstable than the axisymmetric mode for higher Mach numbers.