Picture of wind turbine against blue sky

Open Access research with a real impact...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs.

The Energy Systems Research Unit (ESRU) within Strathclyde's Department of Mechanical and Aerospace Engineering is producing Open Access research that can help society deploy and optimise renewable energy systems, such as wind turbine technology.

Explore wind turbine research in Strathprints

Explore all of Strathclyde's Open Access research content

Drag amplification of long flexible riser models undergoing multi-mode VIV in uniform currents

Huang, Shan and Khorasanchi, Mahdi and Herfjord, Kjell (2011) Drag amplification of long flexible riser models undergoing multi-mode VIV in uniform currents. Journal of Fluids and Structures, 27 (3). pp. 342-353. ISSN 0889-9746

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

Measurement data of longf lexibleriser models are used to study the drag amplification due tomulti-mode vortex induced vibration (VIV). The riser model was towed in a towing tank, and vibration along its length was measured indirectly at a set of discrete points using accelerometers, along with the total drag and lift forces on the model. These data were used to fit expressions for the drag amplification taking into account the spatial variation of the vibration amplitude along the riser length.The result swere compared with the existing empirical expression used in the VIV analysis tool SHEAR7 as wellas other test data. It was found that the expression in SHEAR7 agrees well with the test data. However, for larger vibration amplitudes, it appears to under-predict the drag amplification.