초록 ▼

A staggered fairing system is disclosed for suppressing vortex-induced vibration of a substantially cylindrical marine element in a plurality of fixed fairings are deployed. Each fairing has a leading edge substantially defined by the circular profile of the marine element and a pair of shaped sides

A staggered fairing system is disclosed for suppressing vortex-induced vibration of a substantially cylindrical marine element in a plurality of fixed fairings are deployed. Each fairing has a leading edge substantially defined by the circular profile of the marine element and a pair of shaped sides departing from the circular profile of the marine riser and converging at a trailing edge. The connections between the marine element and the fairings through which the fairings are secured to the marine element in a non-rotative manner hold the fairings in an array of different orientations along the axis of the marine element. A method for protecting a substantially cylindrical marine element from vortex-induced vibration is also disclosed in which a plurality of fairings are installed about the marine element in a non-rotative manner so as establish an array of fairing orientations along the axis of the marine element. This serves to protect the marine element from vortex-induced vibrations over an extended range of angles of attack.

대표청구항 ▼

[ What is claimed is:] [1.] A staggered fairing system for suppressing vortex-induced vibration of a substantially cylindrical marine element, comprising:a plurality of fairings, each having chord and thickness dimensions and comprising:a leading edge substantially defined by the circular profile of

[ What is claimed is:] [1.] A staggered fairing system for suppressing vortex-induced vibration of a substantially cylindrical marine element, comprising:a plurality of fairings, each having chord and thickness dimensions and comprising:a leading edge substantially defined by the circular profile of the marine element for a distance following at least 250 degrees; anda pair of shaped sides departing from the circular profile of the marine element and converging at a trailing edge;wherein the fairing is an ultrashort faring having a chord to thickness ratio for the between about 1.20 and 1.10; andconnections between the marine element and the ultrashort fairings through which the ultrashort fairings are fixedly secured to the marine element in a non-rotative manner, said connections securing the ultrashort fairings in an array of orientations along the axis of the marine element.