| 摘要 |
A leading edge aerofoil (7) for reducing drag on a truck (1) carrying or towing at least one bluff body (3,5) is disclosed. The aerofoil has a curved nose with an upper surface angling away from the nose and a lower surface extending rearwardly from the nose. The profile of the aerofoil is such that the vertical distance from the top of the upper surface to the most forward point of the nose is greater than the vertical distance from the forward point of the nose to the lowest point of the lower surface. The aerofoil is configured for attachment to the most forward bluff body of the load (3) or to the top of the tractor unit (1) such that the aerofoil assists in attaching oncoming airflow to the upper surface of the forward bluff body of the load, thereby reducing drag. Further disclosed is a set of aerofoils including the leading edge aerofoil described above, with an additional trailing edge aerofoil (11) on the rearmost bluff body and, if applicable, an intermediate aerofoil (9) configured to direct the airflow between bluff bodies of the load in order to reduce drag.
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