Cylindrical element adapted to reduce vortex-induced vibration and/or drag
AssigneeAMOG Technologies Pty Ltd
InventorsAndrew Elmhirst Potts, Hayden Marcollo
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Abstract
A generally cylindrical element adapted for immersion in a fluid medium, the cylindrical element comprising an elongate body having a length and a generally circular cross-section, and a plurality of raised body portions disposed about and extending along the length of the elongate body, the raised body portions being arranged generally parallel to a longitudinal axis of the body and having a height between 2% and 10% of a diameter of the body. The plurality of raised body portions are adapted to reduce vortex-induced vibration and/or drag on the cylindrical element when the cylindrical element is immersed in the fluid medium and there is relative movement between the cylindrical element and the fluid medium.
Claims15
A generally cylindrical element adapted for immersion in a fluid medium, the cylindrical element comprising:
- an elongate body having a length and a generally circular cross-section;
- and
- a plurality of raised body portions disposed about and extending along the length of the elongate body, the raised body portions being arranged generally parallel to a longitudinal axis of the body and having a height between 2% and 10% of a diameter of the body, wherein the height is measured along a radius of the body;
- wherein the plurality of raised body portions are generally curved or rounded ridges which define respective curved grooved body portions therebetween, to provide a succession of raised and grooved body portions that present a continuous smooth surface geometry;
- wherein the plurality of raised body portions are adapted to reduce vortex-induced vibration and/or drag on the cylindrical element when the cylindrical element is immersed in the fluid medium and there is relative movement between the cylindrical element and the fluid medium.
A generally cylindrical element adapted for immersion in a fluid medium, the cylindrical element comprising:
- an elongate body having a length and a generally circular cross-section;
- and
- a plurality of raised body portions disposed about and extending along the length of the elongate body, the raised body portions being arranged generally parallel to a longitudinal axis of the body and having a height between 2% and 10% of a diameter of the body, wherein the height is measured along a radius of the body;
- wherein the plurality of raised body portions are generally curved or rounded ridges which define respective curved grooved body portions therebetween, to provide a succession of raised and grooved body portions that present a continuous smooth surface geometry, wherein the grooved body portions are generally concentric to the underlying generally cylindrical element, and wherein each of the respective grooved body portions have radii between 0.75% and 78% of the diameter of the elongate body;
- wherein the plurality of raised body portions are adapted to reduce vortex-induced vibration and/or drag on the cylindrical element when the cylindrical element is immersed in the fluid medium and there is relative movement between the cylindrical element and the fluid medium.
Dependencies are inferred from the claim text.