Coherent turbulence and entrainment in a supersonic, axisymmetric, separated/reattaching shear layer
Branden M. Kirchner, Gregory Elliott, J. C. Dutton
Abstract
Pressure loading in massively separated flow regions is intimately tied to the entrainment characteristics of the separated shear layer, which also determines the streamwise distance required for shear layer reattachment. Using stereoscopic particle image velocimetry measurements of a Mach 2.49 longitudinal cylinder wake, a clear relationship between the presence of coherent turbulent structures (i.e., hairpin vortices) and the shear layer reattachment length is demonstrated.
Topics & Concepts
Particle image velocimetryMechanicsWakeSupersonic speedTurbulenceShear (geology)Mach numberPhysicsEntrainment (biomusicology)VortexOpticsGeologyAcousticsPetrologyRhythmFluid Dynamics and Turbulent FlowsAerodynamics and Acoustics in Jet FlowsComputational Fluid Dynamics and Aerodynamics