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An Investigation of Blowing as a Method of Increasing the Maximum Lift of a Double-Wedge Airfoil


Bacon, John William (1949) 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.


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.

Item Type:Thesis (Engineer's thesis)
Subject Keywords:Aeronautics
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Aeronautics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Nagamatsu, Henry T.
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 June 1949
Record Number:CaltechETD:etd-01272009-155604
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:385
Deposited By: Imported from ETD-db
Deposited On:28 Jan 2009
Last Modified:27 Mar 2023 22:37

Thesis Files

PDF (Bacon_jw_1949.pdf) - Final Version
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