Accession Number : AD0870914

Title :   Wake Properties Behind a Flared Cylindrical Forebody and Aerodynamic Characteristics of Several Flexible Aerodynamic Decelerators at Mach Numbers from 1.75 to 4.75.

Descriptive Note : Final rept. 26 Jan-16 Mar 70,

Corporate Author : ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFS TN

Personal Author(s) : Homan, M. L.

Report Date : JUN 1970

Pagination or Media Count : 68

Abstract : A test was conducted to determine the flow field properties in the wake of a strut-mounted cylindrical forebody with and without base bleed and to determine aerodynamic performance of two types of parachutes. The wake was surveyed from two to eight forebody diameters aft of the base. Parachute separation distance was remotely varied from four to nine forebody diameters aft of the base. Data were obtained at Mach numbers from 1.75 to 4.75 at a nominal free-stream dynamic pressure of 80 psf. Base bleed reduced the local wake Mach number and dynamic pressure behind the forebody at all X/D locations for Z/D = zero. The addition of webs to the Supersonic X parachute, in general, decreased the parachute dynamics at Mach numbers greater than three. (Author)

Descriptors :   (*DROGUE PARACHUTES, SUPERSONIC CHARACTERISTICS), WAKE, FLOW FIELDS, CYLINDRICAL BODIES, PERFORMANCE(ENGINEERING), SEPARATION, BASE FLOW, FLEXIBLE STRUCTURES.

Subject Categories : Gliders and Parachutes
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE