Suppression element for vortex-induced vibrations

A suppression element (1) for vortex vibrations, comprising:

• an envelope (2) for at least partly enveloping a tubular element (100), wherein the envelope is modular to form, in circumferential direction of the tubular element (100), with similar suppression elements a tube (101, 102) which, in operation, at least partly envelops the tubular element, and wherein the suppression element (1) has, in a longitudinal direction (A) of the suppression element (1), a first longitudinal direction (A) end (10) and an opposing second longitudinal direction (A) end (11);
• at least one projection (3) pointing away from the envelope for reducing the formation of vortices on the downstream side of the tubular element (100), wherein the projection (3) extends in the longitudinal direction (A) and lies at an inclined angle to the longitudinal direction (A);
• and
• a directing element (6-8) for positioning the suppression element (1) relative to another said suppression element such that the first end (10) of the suppression element (1) adjoins the second end (11) of said another suppression element;
• characterized in that the projection (3) extends from a first longitudinal direction (A) projection end of the projection (3) near the first end (10) of the suppression element (1) to a second longitudinal direction (A) projection end of the projection (3) near the second end (11) of the suppression element (1), and in that the directing element (6-8) comprises means for positioning the projection (3) such that its first projection end adjoins a second projection end of a projection of said another suppression element, enabling the projections of several said suppression elements to be connected to each other, as a result of which an elongate continuous projection can be obtained.