AN INVESTIGATION OF DRAG REDUCTION FOR A STANDARD TRUCK WITH VARIOUS MODIFICATIONS
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A wind tunnel investigation was conducted to determine the influence of several physical variables on the aerodynamic drag of a standard truck model. The physical variables included: a cab mounted air deflector; a boattail on the rear of the cargo compartment; flow-vanes on the front of the cargo compartment; and a forebody fairing over the cab. Tests were conducted at yaw angles (relative wind angle) of 0, 5, 10, 20, and 30 degrees and Reynolds numbers of 3.4 x 100,000 to 6.1 x 100,000 based upon the equivalent diameter of the vehicles. The forebody fairing and the flow-vane with the closed bottom were very effective in improving the flow over the forward part of the cargo compartment. The forebody fairing provided a calculated fuel saving of 5.6 liters per hour (1.5 gallons per hour) over the baseline configuration for a ground speed of 88.6 km/hr (55 mph) in national average winds.
[1] A E Sheridan,et al. DRAG REDUCTION OBTAINED BY MODIFYING A STANDARD TRUCK , 1978 .
[2] L C Montoya,et al. Aerodynamic drag reduction tests on a full-scale tractor-trailer combination with several add-on devices , 1974 .
[3] V. U. Muirhead. An investigation of drag reduction for tractor trailer vehicles , 1978 .