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Wind Turbine Tower Vortex Shedding Device

IP.com Disclosure Number: IPCOM000224821D
Publication Date: 2013-Jan-07
Document File: 1 page(s) / 54K

Publishing Venue

The IP.com Prior Art Database

Abstract

A device for preventing vortex induced vibrations. It comprises an inflatable tube which surrounds the tower in a helical manner. The tube is made of plastic and is wrapper around the tower prior to the installation of the tower. The tube is inflated with air from a compressor. Just before the nacelle is installed on top of the tower, the tube is deflated so the tube will slide down the tower so that it can be removed. The inflated tube acts as a helical strake to prevent vortex induced vibrations.

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Title: Wind Turbine Tower Vortex Shedding Device

Abstract: A device for preventing vortex induced vibrations. It comprises an inflatable tube which surrounds the tower in a helical manner. The tube is made of plastic and is wrapper around the tower prior to the installation of the tower. The tube is inflated with air from a compressor. Just before the nacelle is installed on top of the tower, the tube is deflated so the tube will slide down the tower so that it can be removed.  The inflated tube acts as a helical strake to prevent vortex induced vibrations.

Disclosure

Wind turbine towers are susceptible to vortex induced vibrations, particularly when the nacelle is not connected to the tower during the erection of the wind turbine. Vortices may coincide with the natural frequency of the tower and amplify oscillations of the tower.

This device prevents vortex induced vibrations. It comprises an inflatable tube which surrounds the tower in a helical manner. The tube is made of plastic and is wrapper around the tower prior to the installation of the tower. The tube is inflated with air from a compressor. Just before the nacelle is installed on top of the tower, the tube is deflated so the tube will slide down the tower so that it can be removed.  The inflated tube acts as a helical strake to prevent vortex induced vibrations as shown in the Figure.