Slotted-wall research with disk and parachute models in the DSMA low-speed wind tunnel

Technical Report · Fri Jun 01 00:00:00 EDT 1990

DOI:https://doi.org/10.2172/6821954· OSTI ID:6821954

Van Every, D; Harris, J L ^[1]

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1. DSMA International, Inc., Mississauga, ON (Canada)

A test program investigated the effects of wall open area ratio (OAR) and model axial position on the measured drag of disk and parachute models in a low-speed wind tunnel. The data and discussion presented in this report provide new insight into the nature of slotted-wall interference for bluff bodies in steady flow and give the first quantitative information on nonsteady wall interference and airflow response during the inflation of a parachute. The report concludes that a fixed OAR of between 5% and 15% should eliminate wall interference during inflation and greatly reduce steady-flow interference for geometric blockages up to 15%. Preliminary arguments suggest that an optimum OAR may be found that alleviates wall interference for large models at low speeds while providing for acceptable testing of smaller models in the transonic speed range. 10 refs., 36 figs., 14 tabs.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA); DSMA International, Inc., Mississauga, ON (Canada)
• Sponsoring Organization: DOE/DP
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6821954
• Report Number(s): SAND-89-7064; ON: DE90013631
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420200* -- Engineering-- Facilities
Equipment
& Techniques
AIR FLOW
COMPILED DATA
DATA
DESIGN
DRAG
FLUID FLOW
FUNCTIONS
GAS FLOW
INFORMATION
NUMERICAL DATA
PARACHUTES
PERFORMANCE TESTING
RELIABILITY
RESPONSE FUNCTIONS
SPECIFICATIONS
STABILITY
TESTING
TUNNELS
UNDERGROUND FACILITIES
VELOCITY
WIND TUNNELS