Full scale CFD simulations of the Generic Conventional Model (GCM), a simplified modelPankajakshan, R. of a Class 8 truck, were used to explore passive devices for improving the drag performanceHilbert, C.B. of the trailer base. Significant improvements over conventional straight base flaps were achieved using an Extended Bent (EB) flap that stays within the length limits imposed Whitfield, D.L.by US federal law. An additional boat tail device for the cab bogie base was also found to yield improvements in the base drag in that region. This device in combination with the EB flap leads to a wind-averaged drag reduction of 21 % over the non-modified GCM model. An under-trailer scoop to generate air for pressurizing the trailer base or for use in active flow control devices was found to add too much drag to be effective.
Passive Devices for Reducing Base Pressure Drag in Class 8 Trucks
Lect.Notes in Applied (formerly:Lect.Notes Appl.Mechan.)
International Conference on Engineering Conferences International ; 2010 ; Potsdam, Germany September 12, 2010 - September 17, 2010
2015-08-20
9 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Passive Devices for Reducing Base Pressure Drag in Class 8 Trucks
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