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FLOW CHARACTERISTICS OF RIGID RIBBON PARACHUTE CANOPIES IN SUPERSONIC FLOW.
Final rept. 15 Apr 63-15 Apr 65,
MINNESOTA UNIV ST PAUL
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An inlet diffuser model was used in freestream and wake flows to establish the relationship between shock wave standoff distance and mass flow through a cavity. The results of these experiments were used to devise a method to calculate shock wave stanoff distances as a function of the mass flow through the cavity. By means of further experiments, it was shown that this method is useful for carrying out similar calculations for porous parachutes in supersonic flow. The interaction between suspension line boundary layers and the bow shock of porous parachute canopies, and its effect upon the pressure distribution and the pressure drag coefficient, has been studied. Pressure drag coefficients depending on the number of suspension lines were established. Author
APPROVED FOR PUBLIC RELEASE