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- W94368436 abstract "The use of planar-sided boat tail plates for aft-end drag reduction on a tractor-trailer was studied numerically, experimentally and on a full scale prototype. Parametric wind tunnel tests utilized a 1:15 scale Peterbilt 379 tractor and 48 foot (14.6 m) trailer with cavity plate concepts mounted perpendicular to the trailer base. Yaw angles up to 9 degrees were examined. Qualitative numerical results confirmed a pressure increase on the aft face of the trailer. Model drag increments, obtained at zero yaw and a width-based Reynolds number of 230,000, based on trailer width, indicated reductions in the drag coefficient, based on frontal area, of up to 0.075 or about 9% of the baseline model trailer drag. Removal of the top plate degraded the performance of all devices. Performance also decreased with yaw angle for all plates mounted perpendicular to the trailer base, contrary to devices with angled plates. Devices with shorter angled plates indicated better performance with the top open rather than an open bottom. Drag reduction was more sensitive to plate inset from the trailer edge than to plate length and a zero inset of the bottom plate maximized performance. Two full scale prototypes were road tested, the first utilized rigid composite sides with a flexible top and bottom and the second was an all rigid-sided aluminum design. The former exhibited cross-country road fuel savings of about 0.5 miles per gallon (0.2 kilometers/liter), approximately 9%, over a 10,000 mile (16,093 km) trip, while the latter returned inconclusive results. Estimated fuel savings for a typical 120,000 miles (193,121 km) per year traveled were approximately 1500 gallons (5677 liters) per truck." @default.
- W94368436 created "2016-06-24" @default.
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- W94368436 date "2004-01-01" @default.
- W94368436 modified "2023-09-30" @default.
- W94368436 title "Drag Reduction of a Tractor-Trailer Using Planar Boat Tail Plates" @default.
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- W94368436 doi "https://doi.org/10.1007/978-3-540-44419-0_24" @default.
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