Structure of a reattaching supersonic shear flowA Mach 1.83 fully developed turbulent boundary layer with boundary layer thickness, free stream velocity, and Reynolds number of 7.5 mm, 476 m/s, and 6.2 x 10 to the 7th/m, respectively, was separated at a 25.4-mm backward step and formed a shear layer. Fast-response pressure transducers, schlieren photography, and LDV were used to study the structure of this reattaching shear flow. The preliminary results show that large-scale relatively organized structures with limited spanwise extent form in the free shear layer. Some of these structures appear to survive the recompression and reattachment processes, while others break down into smaller scales and the flow becomes increasingly three-dimensional. The survived large-scale structures lose their organization through recompression/reattachment, but regain it after reattachment. The structures after reattachment form a 40-45-degree angle relative to the free stream and deteriorate gradually as they move downstream.
Document ID
19880061674
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Samimy, M. (Ohio State University Columbus, United States)
Abu-Hijleh, B. A. K. (Ohio State Univ. Columbus, OH, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1988
Subject Category
Aerodynamics
Report/Patent Number
AIAA PAPER 88-3615
Meeting Information
Meeting: AIAA, ASME, SIAM, and APS, National Fluid Dynamics Congress