scholarly journals WIND TUNNEL STUDY ON THE EFFECT OF THE GAP WIDTH IN THE AERODYNAMIC AND AEROELASTIC RESPONSES OF TWIN-BOX DECKS

2018 ◽  
Author(s):  
FÉLIX NIETO ◽  
MIGUEL CID MONTOYA ◽  
ARTURO FONTÁN ◽  
SANTIAGO HERNÁNDEZ ◽  
CARLOS RAPELA ◽  
...  
Keyword(s):  
Wind Tunnel ◽  
Wind Tunnel Study ◽  
Gap Width

A Wind-Tunnel Study of the Effect of Gap Flow and Gap Seals on the Aerodynamic Drag of Tractor-Trailer Trucks

1978 ◽  
Vol 100 (4) ◽  
pp. 434-438 ◽  
Author(s):  
F. T. Buckley ◽  
C. H. Marks
Keyword(s):  
Wind Tunnel ◽  
Drag Coefficient ◽  
Aerodynamic Drag ◽  
Motor Fuel ◽  
Center Line ◽  
Gap Flow ◽  
Yaw Angle ◽  
Wind Tunnel Study ◽  
Gap Width ◽  
Coefficient Reduction

The effect of gap width on the aerodynamic drag of a cab-over-engine tractor-trailer combination has been investigated for full-scale gap widths ranging from 0.61 m (24 in) to 1.83 m (72 in.) over a yaw angle range of 0 to 20 deg. The average drag on the vehicle was found to increase by 16 percent as the gap width increased from 0.61 m to 1.83 m. Drag reductions were found when a vertical seal was placed along the vehicle center line between the tractor and the trailer. Generally, the drag reduction increased as the percentage of gap width that was sealed increased, and as the yaw angle increased. The average drag coefficient reduction provided by a full gap seal increased from 0.02 to 0.05 as the gap width increased from 0.61 m to 1.4 m and then decreased slightly for gap widths up to 1.83 m. The effect of vehicle configuration on gap seal effectiveness was evaluated for a gap width of 1.3 m (51 in.) using models of six different tractors and two different trailers. The average drag coefficient reductions that were found ranged from 0.04 to 0.08 with 83 percent of the data being either 0.04 or 0.05. It is shown that the use of gap seals on the nearly half-million vehicles which comprise the nation’s long-haul trucking fleet can result in the conservation of about 1.4 × 109 liters (0.37 × 109 gal) of motor fuel each year.

Wind Tunnel Study of a Large Aerostat, CFD Validation

2013 ◽  
Author(s):  
Stephen C. Chan ◽  
John D. Hunt ◽  
Kaleb Shervington
Keyword(s):  
Wind Tunnel ◽  
Cfd Validation ◽  
Wind Tunnel Study

Wind tunnel study of wind effects on a high-rise building at a scale of 1:300

2018 ◽  
Vol 174 ◽  
pp. 391-403 ◽  
Author(s):  
R. Sheng ◽  
L. Perret ◽  
I. Calmet ◽  
F. Demouge ◽  
J. Guilhot
Keyword(s):  
Wind Tunnel ◽  
Wind Effects ◽  
High Rise ◽  
High Rise Building ◽  
Wind Tunnel Study
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