Mixing of high speed coaxial jets

Mixing performances of five different supersonic nozzles namely: elliptical, tabbed, conical, radially lobed and two-dimensional lobed were compared experimentally. The experiments aimed to provide comparisons of mixing performance under identical conditions with that of convential mixing nozzles. The mixing of the supersonic stream with a coaxial sonic stream coming from the nozzle was investigated non-intrusively using digital image processing of planer Mie-scattering images of the flow fields.