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Title: Aerodynamics of two-dimensional slotted bluff bodies

Abstract

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.

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

Citation Formats

Takahashi, F, and Higuchi, H. Aerodynamics of two-dimensional slotted bluff bodies. United States: N. p., 1988. Web.
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Takahashi, F, & Higuchi, H. Aerodynamics of two-dimensional slotted bluff bodies. United States.
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Takahashi, F, and Higuchi, H. Sat . "Aerodynamics of two-dimensional slotted bluff bodies". United States.
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@article{osti_6493523,
title = {Aerodynamics of two-dimensional slotted bluff bodies},
author = {Takahashi, F and Higuchi, H},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/6493523}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {4}
}
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Technical Report:
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