The near wake of a blunt-base cylinder at 10° angle-of-attack to a Mach 2.46 free-stream flow is visualized at several locations to study unsteady aspects of its structure. In both side-view and end-view images, the shear layer flapping grows monotonically as the shear layer develops, similar to the trends seen in a corresponding axisymmetric supersonic base flow. The interface convolution, a measure of the tortuousness of the shear layer, peaks for side-view and end-view images during recompression. The high convolution for a septum of fluid seen in the middle of the wake indicates that the septum actively entrains fluid from the recirculation region, which helps to explain the low base pressure for this wake compared to that for a corresponding axisymmetric wake.
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e-mail: akastengren@anl.gov
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November 2005
Technical Papers
Aspects of Shear Layer Unsteadiness in a Three-Dimensional Supersonic Wake
Alan L. Kastengren,
Alan L. Kastengren
Energy Systems Division, Argonne National Laboratory, 9700 S. Cass Ave., Argonne, IL 60439
e-mail: akastengren@anl.gov
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J. Craig Dutton
J. Craig Dutton
Mechanical & Aerospace Engineering Department,
The University of Texas at Arlington
, 500 West First Street, Arlington, TX 76019
Search for other works by this author on:
Alan L. Kastengren
Energy Systems Division, Argonne National Laboratory, 9700 S. Cass Ave., Argonne, IL 60439
e-mail: akastengren@anl.gov
J. Craig Dutton
Mechanical & Aerospace Engineering Department,
The University of Texas at Arlington
, 500 West First Street, Arlington, TX 76019J. Fluids Eng. Nov 2005, 127(6): 1085-1094 (10 pages)
Published Online: July 5, 2005
Article history
Received:
August 2, 2004
Revised:
July 5, 2005
Citation
Kastengren, A. L., and Dutton, J. C. (July 5, 2005). "Aspects of Shear Layer Unsteadiness in a Three-Dimensional Supersonic Wake." ASME. J. Fluids Eng. November 2005; 127(6): 1085–1094. https://doi.org/10.1115/1.2062727
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