PIV-based study of a cylindrical roughness element in a hypersonic laminar-boundary layer

Title

PIV-based study of a cylindrical roughness element in a hypersonic laminar-boundary layer

 Author

Avallone, F.
Ragni, D.
Schrijer, F.F.J.
Scarano, F.
Cardone, G.

Faculty

Aerospace Engineering

 Department

Aerodynamics, Wind Energy & Propulsion

 Date

2015-12-31

 Abstract

In this study, the mean flow organization in the symmetry plane of the recirculation region ahead of a cylindrical roughness element immersed in an incoming laminar boundary layer at Mach number equal to 6.5 is investigated. The flow topology is inspected with planar particle image velocimetry (PIV), InfraRed (IR) Thermography and Schlieren flow visualization. The flow approaching the roughness element forms a main recirculation region ahead of the cylinder leading edge. The reattachment vortex is the responsible of a heat flux local peak in front of the protuberance. Secondary, a more complex system of vortices is observed upstream of the protuberance, which also corresponds to the local maximum of turbulent kinetic energy and wall heat transfer.

 To reference this document use:

http://resolver.tudelft.nl/uuid:75d62074-dbff-48f8-96be-813fe78c5786

 Source

11th International Symposium on Particle Image Velocimetry, PIV15, Santa Barbara, CA, USA, September 14-16 2015; Authors version

 Part of collection

Institutional Repository

 Document type

conference paper

 Rights

(c) 2015 The Author(s)
Files
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