Accession Number:

AD0810495

Title:

INVESTIGATION OF THE FLOW FIELD DURING THE INFLATION OF CLUSTERED PARACHUTES.

Descriptive Note:

Final rept. 16 Apr 65-15 Apr 66,

Corporate Author:

MINNESOTA UNIV MINNEAPOLIS DEPT OF AERONAUTICS AND ENGINEERING MECHANICS

Personal Author(s):

• Niccum, Ronald J.
• Kovacevic, Nebojsa D.

Report Date:

1966-11-01

Pagination or Media Count:

41.0

Abstract:

Clustered parachutes during the period of inflation were simulated by elliptical cylinders in potential flow and so-called OHara shape parachutes in water flow and wind tunnel experiments. The results are presented in the form of streamline and pressure distribution plots around the respective bodies. Results show that when geometric symmetry is disturbed, the flow field becomes unsymmetrical and strong attractive or repulsive forces are developed. This allows a variety of inflation modes to occur and, hence, poor cluster opening performance. Author

Descriptors:

• *PARACHUTE DESCENTS
• *FLOW FIELDS
• *AIR DROP OPERATIONS
• *CARGO PARACHUTES
• FILLING
• PERFORMANCE(ENGINEERING)
• WIND TUNNEL MODELS
• CYLINDRICAL BODIES
• MATHEMATICAL MODELS
• ELLIPSOIDS
• DECELERATION
• WAKE
• WATER TUNNELS
• PRESSURE PATTERN FLIGHT
• CONFIGURATIONS
• DEPLOYMENT
• TEST METHODS
• TEST EQUIPMENT
• PARACHUTES

Subject Categories:

• Gliders and Parachutes
• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE