ISSN:
1089-7666
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The local two-dimensional stability characteristics of a confined compressible mixing layer with a hyperbolic tangent velocity profile are studied on an inviscid basis. By examining the temporal growth rate at the saddle point in the wave number space, the flow is characterized as being either absolutely unstable or convectively unstable. Results are presented, showing the amount of backflow necessary to have this type of transition for a range of primary flow Mach number, M1, up to 3.0. The transition curve for M1 between zero and 1.0 and between 1.35 and 3.0 is defined by a single curve. However, for M1 between 1.0 and 1.35, multiple transition curves exist, due to the fact that multiple modes exist when M1 is greater than unity. In this region the mode that becomes absolutely unstable depends on the magnitude of the back flow.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.868099
