Experimental investigation of supersonic laminar, two-dimensional boundary layer separation in a compression corner with and without cooling

• Main Author: Lewis, John Eldon
• Format: Others
• Published: 1967
• Online Access: https://thesis.library.caltech.edu/4587/1/Lewis_je_1967.pdf; Lewis, John Eldon (1967) Experimental investigation of supersonic laminar, two-dimensional boundary layer separation in a compression corner with and without cooling. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/R0FB-DD20. https://resolver.caltech.edu/CaltechETD:etd-11162005-102455 <https://resolver.caltech.edu/CaltechETD:etd-11162005-102455>

An experimental investigation of the boundary layer separation associated with a compression corner was conducted in the GALCIT Mach 6 wind tunnel, and a supplementary study was performed in the JPL supersonic wind tunnel. Special emphasis was placed on the development of a wind tunnel model which approximated true two-dimensional flow, and which could be run in either a highly cooled or an adiabatic configuration. The basic measurements consist of the model surface pressure and temperature, and Pitot surveys of the boundary layer. The surface pressure distributions for the adiabatic wall configurations are compared with the theory of Lees and Reeves (modified by Klineberg and Lees). The surface pressure distribution for the cold wall was compared with the adiabatic configuration for a laminar interaction, and the dependence on Reynolds number for both laminar and transitional interactions are observed. The "free interaction" similarity suggested by Chapman is empirically tested and found to be a good approximation for the adiabatic configuration, but it fails to correlate the cooled with the adiabatic case. The scaling suggested by Curle was tested and found to eliminate this deficiency.