Accession Number : AD0478627

Title :   EXPERIMENTAL DETERMINATION OF TRANSONIC AND SUPERSONIC PRESSURE DISTRIBUTION AND MASS FLOW ACCOMMODATION FOR RIBBON PARACHUTES DURING INFLATION. VOL. I--THE 27% GEOMETRIC POROSITY HEMISFLO RIBBON PARACHUTE.

Descriptive Note : Final rept. 15 Apr 63-15 Apr 65,

Corporate Author : MINNESOTA UNIV MINNEAPOLIS DEPT OF AERONAUTICS AND ENGINEERING MECHANICS

Personal Author(s) : Niccum, Ronald J. ; Goar, Keith J. ; Lenius, Warren W.

Report Date : DEC 1965

Pagination or Media Count : 95

Abstract : The measured mass flows are analyzed relative to free stream velocity and density ratio. The results are presented as ratios of measured to inviscid flow through the canopy inlet area, thus giving a measure of the canopy's ability to accommodate the air mass entering the parachute mouth. Related to the mass flow studies, was the determination of pressure distributions on the internal and external canopy surfaces. Measurements were made at Mach 0.8, 1.2, and 3.0. In addition, several tests were conducted using an ogive forebody at two upstream locations. The wake of the ogive forebody with respect to pressure is analyzed. (Author)

Descriptors :   (*RIBBON PARACHUTES, DEPLOYMENT), AERODYNAMIC LOADING, PRESSURE, DISTRIBUTION, GAS FLOW, TRANSONIC CHARACTERISTICS, SUPERSONIC CHARACTERISTICS, SHOCK WAVES, SUSPENSION DEVICES, CORDAGE, WAKE, DENSITY, OGIVES, AERODYNAMIC CONFIGURATIONS, ALTITUDE, AIRSPEED, WIND TUNNEL MODELS, MODEL TESTS, PERFORMANCE(ENGINEERING), EXPERIMENTAL DATA, POROSITY.

Subject Categories : Gliders and Parachutes
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE