NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
High-Speed Schlieren Movies of Decelerators at Supersonic SpeedsTests were conducted on several types of porous parachutes, a paraglider, and a simulated retrorocket. Mach numbers ranged from 1.8-3.0, porosity from 20-80 percent, and camera speeds from 1680-3000 feet per second (fps) in trials with porous parachutes. Trials of reefed parachutes were conducted at Mach number 2.0 and reefing of 12-33 percent at camera speeds of 600 fps. A flexible parachute with an inflatable ring in the periphery of the canopy was tested at Reynolds number 750,000 per foot, Mach number 2.85, porosity of 28 percent, and camera speed of 36oo fps. A vortex-ring parachute was tested at Mach number 2.2 and camera speed of 3000 fps. The paraglider, with a sweepback of 45 degrees at an angle of attack of 45 degrees was tested at Mach number 2.65, drag coefficient of 0.200, and lift coefficient of 0.278 at a camera speed of 600 fps. A cold air jet exhausting upstream from the center of a bluff body was used to simulate a retrorocket. The free-stream Mach number was 2.0, free-stream dynamic pressure was 620 lb/sq ft, jet-exit static pressure ratio was 10.9, and camera speed was 600 fps.
Document ID
20070030973
Acquisition Source
Langley Research Center
Document Type
Video
Date Acquired
August 24, 2013
Publication Date
August 10, 1960
Subject Category
Aerodynamics
Report/Patent Number
L-569
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Keywords
SUPERSONIC SPEED
BRAKES (FOR ARRESTING MOTION)
[Division] UPWT
HIGH SPEED CAMERAS
SCHLIEREN PHOTOGRAPHY

Available Downloads

There are no available downloads for this record.
No Preview Available