| 摘要 |
Disclosed is a drag reduction system for a vehicle which comprises an air distribution system, including a nozzle arrangement for providing a directed air flow away from the direction of vehicle travel, a flow regulation arrangement and a sensor arrangement for sensing vehicle speed and/or an air speed relative to the vehicle. The flow regulation arrangement regulates air flow through the nozzle arrangement as a function of vehicle speed and/or air speed information received from the sensor arrangement. The directed air flow from the nozzle arrangement causes adjacent air flow to be pulled towards, or held against, the directed air flow. This is an example of the Coanda effect, and acts to reduce turbulence and low- pressure behind a moving vehicle,and thus aerodynamic drag. The optimal velocity of the directed air flow depends on the vehicle's speed and/or the speed of air relative to the vehicle. Thus, air flow through the nozzle arrangement is regulated based on the readings from the sensor arrangement. |
