An investigation of blowing as a method of increasing the maximum lift of a double-wedge airfoil

• Main Author: Bacon, J. W.
• Format: Others
• Published: 1950
• Online Access: https://thesis.library.caltech.edu/385/1/Bacon_jw_1949.pdf; Bacon, J. W. (1950) An investigation of blowing as a method of increasing the maximum lift of a double-wedge airfoil. Engineer's thesis, California Institute of Technology. doi:10.7907/NT63-HE54. https://resolver.caltech.edu/CaltechETD:etd-01272009-155604 <https://resolver.caltech.edu/CaltechETD:etd-01272009-155604>

This report presents the results of an investigation of boundary layer energization by blowing as a method of increasing the maximum lift coefficient for supersonic airfoils operating at low subsonic speeds. The model used was a double wedged airfoil with end plates and a spanwise slot located at the 15%, 25% or 35% chord position. Air was blown back over the wing from this slot producing a considerable increase in maximum lift for most configurations. Blowing proved to be most effective in increasing the maximum lift when used with the nose flap, fairly effective with combined flaps and wing alone, but ineffective with the split flap.