Flow Field Properties in the Vicinity of a Tractor/Semitrailer Truck,and Correlations with the Aerodynamic Disturbance of an Adjacent Vehicle.

摘要

Flow field properties were measured at various locations in the vicinity of a tractor/semitrailer truck. The results were expressed as 3dimensional flow vectors,and as dynamic pressure estimates. The dynamic pressure estimates provided some qualitative understanding of the nature of the flow field. The overall results of changing the truck width from 96to 102in. are discussed. The results and effects are consistent with the changes which occur to the disturbing forces and moments on a passenger vehicle,when operating in the vicinity of a truck or bus during an overtaking and passing maneuver.