Accession Number : AD0771771

Title :   Aerodynamic Coefficients and Pressure Distribution of Solid Flat and Ringslot Models in One-Dimensional Velocity Gradients.

Descriptive Note : Final rept. Feb 70-Jul 72,

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

Personal Author(s) : Heinrich,H. G. ; Noreen,R. A. ; Dale,J. N.

Report Date : DEC 1973

Pagination or Media Count : 87

Abstract : The results of wind tunnel studies of the aerodynamic characteristics of solid flat and ringlsot parachute models in flow with several linear one-dimensional dynamic pressure gradients are presented. The models had nominal diameters of about 16 in. Gradients of 0%, 10%, 20%, and 40% of centerline dynamic pressure per foot with centerline velocities of 60 ft/sec and 90 ft/sec were established for the tests. Surface pressure measurements were made on rigid porous models, and drag coefficients obtained by integration of the pressure distribution. Aerodynamic force and moment coefficients were determined from force measurements on flexible models. (Author)

Descriptors :   *Parachutes, *Aerodynamic characteristics, Deceleration, Drag, Aerodynamic forces, Pressure, Coefficients, Wind tunnel models

Subject Categories : Gliders and Parachutes

Distribution Statement : APPROVED FOR PUBLIC RELEASE