Flow developing properties of a compressible parallel jet

Two-point space–time correlation and Fourier spectrum analysis are applied to large-eddy simulation results of a compressible parallel jet flow at Reynolds number 2000 Mach 0.9. Flow properties including instantaneous vortical structures, intermittency, convection velocity pressure signals in the near flow-field presented discussed. The show multi-scale features structures after transition. High intermittency is found occur around outer edges shear layer region surrounding potential core, where motion vortices vigorous. In order analyze vortices, center plane calculated by designed solution procedure. high zone shown be “V” shaped cap covering core. fluctuation analyzed so as study effects vortex motion. feature wave-packets contain multiple dominant frequencies. distribution frequencies characterized terrace with stairs descending both streamwise lateral directions. addition, phase frequency–wavenumber diagram unveils that fluctuations travel stable along lip-line jet, while component supersonic salient downstream transition outside layer.