The countercurrent mixing layer: Strategies for shear-layer control

P. J. Strykowski, A. Krothapalli

Research output: Chapter in Book/Report/Conference proceedingConference contribution

22 Scopus citations


The dynamics of a spatially developing countercurrent mixing layer is studied in a parameter space including velocity ratio, density ratio, and convective Mach number. Under an appropriate set of operating conditions, the countercurrent mixing layer displays strong global oscillations which significantly alter the spatial development of the flow. Evidence is presented which suggests these oscillations are associated with a transition from convective to absolute instability. Countercurrent mixing is examined as a novel control strategy of supersonic free shear flows. Experiments indicate that counterflow can be used effectively to enhance mixing in supersonic axisymmetric jets. It is also demonstrated that counterflow can be successfully employed for the thrust vector control of high-speed rectangular jets.

Original languageEnglish (US)
Title of host publicationAIAA 2nd Shear Flow Conference, 1993
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
StatePublished - Jan 1 1993
EventAIAA 2nd Shear Flow Conference, 1993 - Orlando, United States
Duration: Jul 6 1993Jul 9 1993


OtherAIAA 2nd Shear Flow Conference, 1993
Country/TerritoryUnited States


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