BLUFF BODY ADAPTIVE WAKE REDUCTION SYSTEM

摘要

A Bluff body adaptive wake reduction system includes a series of fairings mounted to outer surfaces of the aft end of the road vehicle The fairings are streamlined in geometry with an outer surface, a partially hallow core, and with a rear end surface curved such that left and right hand sides are convergent behind the vehicle. The fairings are coupled to at least one ram air inlet and also include at least one blown slot positioned on the rear end of the fairings enabling air flow to exit the fairings tangent to the rear end surface of the fairings. Air flow enters the system through the ram air inlets and exits through the blown slots. Air flow exiting the blown slots promotes flow traveling over the outer surface to remain attached to the outer surface and thus to the rear end surface. The rear end surface then deflects air flow to follow a convergent trajectory behind the vehicle in such a fashion as to reduce the size of the wake, and as a result reduce the aerodynamic drag.