Aerodynamics of two-dimensional slotted bluff bodies

Technical Report · Sat Apr 30 00:00:00 EDT 1988

OSTI ID:6493523

Takahashi, F; Higuchi, H

Aerodynamic characteristics of two-dimensional, slotted bluff bodies were experimentally investigated. Flow visualizations, base pressure measurements, mean velocity vector measurements, and drag force measurements were conducted to analyze effects of spacing ratio (i.e., porosity), curvature, and vent. Low porosity model configurations produced stable near-wake patterns with enhanced vortex sheddings of overall wake formations. Model curvature reduced drag forces and weakened the vortex sheddings. Stabilizing effect of curvature on the near-wake patterns was also found. A vent combined with large model curvature was found to control drag force effectively, as well as suppressing vortex sheddings. 10 refs., 52 figs., 1 tab.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA); Minnesota Univ., Minneapolis (USA). Dept. of Aerospace Engineering and Mechanics
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6493523
• Report Number(s): SAND-88-7151; ON: DE89007288
• Resource Relation: Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
VORTEX FLOW
FLOW VISUALIZATION
AERODYNAMICS
ANEMOMETERS
CALIBRATION
DATA ACQUISITION
DATA ANALYSIS
DRAG
EXPERIMENTAL DATA
PARACHUTES
SCALE MODELS
SMOKES
WIND TUNNELS
AEROSOLS
COLLOIDS
DATA
DISPERSIONS
FLUID FLOW
FLUID MECHANICS
INFORMATION
MEASURING INSTRUMENTS
MECHANICS
NUMERICAL DATA
RESIDUES
SOLS
STRUCTURAL MODELS
TUNNELS
UNDERGROUND FACILITIES
640410* - Fluid Physics- General Fluid Dynamics