Abstract
The merit of a system consisting of a roof-top fairing and an air-turbine integrated within the fairing, which were wholly mounted on the cabin roof of a container-truck, was evaluated by model experiments in a wind tunnel. The turbine absorbs the air power passing through an internal air duct from the high-pressure front opening to the top exit in the low pressure region. It aimed both the aerodynamic drag reduction by the fairing and the power generation by the turbine. The experiments demonstrated that the system could contribute much to the economy of the truck.
