Instabilitaet eines Kompressiblen Runden Freistrahis unter Beruecksichtigung des Einflusses der Strahigrenzschichtdicke (Instability of a Compressible Circular Jet Considering the Influence of the Thickness of the Jet Boundary Layer),
DEUTSCHE FORSCHUNGS- UND VERSUCHSANSTALT FUER LUFT- UND RAUMFAHRT E V BERLIN (WEST GERMANY)
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The instability of a circular jet is investigated by means of the inviscid linearized stability theory. By variation of a jet parameter which takes the ratio of jet radius to boundary layer thickness into account, the influence of axisymmetry on the spatial growth rate and disturbance phase velocity is studied. Furthermore, the influence of Mach number and temperature ratio is discussed. A comparison with measurements shows that the instability of a turbulent jet boundary layer may also be explained by these results.
- Fluid Mechanics