Experimental Investigation of Mechanical Distortions to Hypersonic Boundary Layers
- Creators
- Flaherty, W.
- Austin, J. M.
- Other:
- Konstantinos, Kontis
Abstract
Destabilization of the boundary layer in hypervelocity flight can significantly increase the surface heat flux. For example, a stretch of concave surface curvature has been found to increase the skin friction by 125 % [1]. Goertler vortices were found to cause fluctuations in heat transfer of 20-30% in a Mach 7.1 flow over a concave compression ramp [2]. Ekoto et al. carried out an extensive study of global (adverse, favorable, and combined pressure gradients) and local (due to surface roughness) distortions in a turbulent hypersonic boundary layer [3]. Building on these works, we experimentally investigate the structure and breakdown of imposed vortex structures in a laminar hypervelocity boundary layer over a flat plate, and linear and curved compression surfaces.
Additional Information
© 2012 Springer. The authors gratefully acknowledge researchers at ISSI, Prof. G.S. Elliott, and the support of AFOSR FA9550-08-1-0172 with Dr. John Schmisseur as Program Manager and AFRL FA8650-10-M-3023 with Dr. Daniel Tejtel as Program Manager.Additional details
- Eprint ID
- 50116
- Resolver ID
- CaltechAUTHORS:20140930-094655581
- Air Force Office of Scientific Research (AFOSR)
- FA9550-08-1-0172
- Air Force Research Laboratory (AFRL)
- FA8650-10-M-3023
- Created
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2014-10-03Created from EPrint's datestamp field
- Updated
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2019-10-03Created from EPrint's last_modified field
- Caltech groups
- GALCIT