Effect of angle of attack and exit nozzle design on the performance of a 16-inch ram jet at Mach numbers from 1.5 to 2.0

Eugene Perchonok, Fred Wilcox, Donald Pennington
naca-rm-e51g26
Oct 1951


An investigation of the performance of a 16-inch ram jet engine having a single oblique- shock all-external compression inlet designed for a flight Mach number of 1.8, was conducted in the NACA Lewis 8-by 6-foot supersonic wind tunnel. Data were obtained at Mach numbers from 1.5 to 2.0 and angles of attack from 0 degrees to 10 degrees. Three exit nozzles were used; a cylindrical extension of the combustion chamber, a 4 degrees half-angle converging nozzle with a 0.71 contraction ratio, and a graphite converging-diverging nozzle having a 0.71 contraction ratio plus reexpansion to essentially major body diameter.

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