Mini skirt aerodynamic fairing device for reducing the aerodynamic drag of ground vehicles
First Claim
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1. An aerodynamic device for reducing drag on a ground vehicle, comprising:
- a first pair of rigid panels attached to the left side of the bottom surface of the vehicle and extending downward from the vehicle, including an outer panel substantially coplanar with the left surface of the vehicle and an inner panel located inboard of the outer panel and separated from the outer panel by a horizontal distance;
a second pair of rigid panels attached to the right side of the bottom surface of the vehicle and extending downward from the vehicle, including an outer panel substantially coplanar with the right surface of the vehicle and an inner panel located inboard of the outer panel and separated from the outer panel by a horizontal distance;
wherein the first and second pairs of rigid panels are configured with each panel extending downward from the vehicle a desired vertical distance and having a lower edge that is aerodynamically sharp; and
wherein each of the horizontal and vertical distances are configured so as to form a first and second inverted U-shaped channel open to the downward direction, with the panels configured to generate a vortex within the channel when the ground vehicle is in motion, wherein the vortex has an axis of rotation aligned with the direction of motion of the ground vehicle.
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Abstract
A device for the reduction of aerodynamic drag and for improved performance and stability of ground vehicles by reducing the mass and velocity of the flow passing under a vehicle is described. The device is particularly suited for a tractor-trailer truck system that includes a motorized lead vehicle pulling one or more non-motorized vehicles. The device is designed to control the flow from entering the undercarriage region from the side of a trailer of a tractor-trailer truck system.
215 Citations
20 Claims
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1. An aerodynamic device for reducing drag on a ground vehicle, comprising:
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a first pair of rigid panels attached to the left side of the bottom surface of the vehicle and extending downward from the vehicle, including an outer panel substantially coplanar with the left surface of the vehicle and an inner panel located inboard of the outer panel and separated from the outer panel by a horizontal distance; a second pair of rigid panels attached to the right side of the bottom surface of the vehicle and extending downward from the vehicle, including an outer panel substantially coplanar with the right surface of the vehicle and an inner panel located inboard of the outer panel and separated from the outer panel by a horizontal distance; wherein the first and second pairs of rigid panels are configured with each panel extending downward from the vehicle a desired vertical distance and having a lower edge that is aerodynamically sharp; and wherein each of the horizontal and vertical distances are configured so as to form a first and second inverted U-shaped channel open to the downward direction, with the panels configured to generate a vortex within the channel when the ground vehicle is in motion, wherein the vortex has an axis of rotation aligned with the direction of motion of the ground vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An aerodynamic device for reducing drag on a ground vehicle comprising:
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a first pair of rigid panels comprised of one or more longitudinal segments attached to the left side of the bottom surface of the vehicle and extending downward from the vehicle, including an outer panel substantially coplanar with the left surface of the vehicle, an inner panel located inboard of the outer panel, and a horizontal panel between the outer and inner panels with the horizontal panel separating the outer and inner panels by a horizontal distance; a second pair of rigid panels comprised of one or more longitudinal segments attached to the right side of the bottom surface of the vehicle and extending downward from the vehicle, including an outer panel substantially coplanar with the left surface of the vehicle, an inner panel located inboard of the outer panel, and a horizontal panel between the outer and inner panels with the horizontal panel separating the outer and inner panels by a horizontal distance; and wherein the first and second pairs of rigid panels are configured with each panel extending downward from the vehicle a vertical distance and with each horizontal distance so as to form a first and second channel open to the downward direction with the panels configured to generate a vortex within the channel when the ground vehicle is in motion, wherein the vortex has an axis of rotation aligned with the direction of motion of the ground vehicle. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification