SPOILER

-A spoiler is an automotive aerodynamicdevice whose intended design function is to 'spoil' unfavorable air movement across a body of a vehicle in motion.

-Spoilers on the front of a vehicle are often called air dams, because in addition to directing air flow they also reduce the amount of air flowing underneath the vehicle which reducesaerodynamic lift.

- Spoilers are often fitted torace and high-performance sports cars

-diffusion is accomplished by increasing amounts of turbulence flowing over the shape, "spoiling" the laminar flow and providing a cushion for the laminar boundary layer.

-The main design goal of a spoiler in passenger vehicles is to reduce drag and increase fuel efficiency

-Front spoilers, found beneath the bumper, are mainly used to direct air flow away from the tires to the underbody where the drag coefficient is less.

-Rear spoilers, which modify the transition in shape between the roof and the rear and the trunk and the rear, act to minimize the turbulence at the rear of the vehicle.

-Adding a rear spoiler makes the air "see" a longer, gentler slope from the roof to the spoiler, which helps to delay flow separation. This decreases drag, increases fuel economy, and helps keep the rear window clean.

-A front spoiler, or air dam, is positioned under the front bumper. shaped to reduce the airflow under the car.  Air dams increase the airflow to the radiator, reduce aerodynamic drag and reduce lift.