This paper presents the model study on the spar platform designed to support 5MW wind turbine in 300m water depth. The diameter of the Spar is 16m, draft is 90m and freeboard is 10m. A 1:100 scale model of the spar is studied in the wave basin. The effect of circular disc of diameter 24m at the bottom of the spar on the heave and surge at the top of the wind tower is reported for the wave height of about 6m and wave period in the range of 6s to 28s, whereas the prototype wave period range is from 6s to 18s. Copyright © 2009 by ASME.

Ranganathan Sundaravadivelu

Department of Ocean Engineering

T. Seebai

Chiruvai P. Vendhan

Circular discs

MODEL STUDY

MW WIND TURBINE

Scale models

SPAR PLATFORMS

water depth

WAVE BASINS

Wave heights

Wave period

WIND TOWERS

Oceanography

Wind power

Wind turbines

ARCTIC ENGINEERING

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Model Studies on Spar Platform With 5MW Wind Turbine

Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE

This paper presents the effects of heave plate on heave damping of spar with single and two heave plates for supporting the offshore wind turbine. Heave free decay tests are carried out experimentally on 1:50 scale model of spar with single and two heave plates for finding the heave damping. Heave dampings are also obtained numerically using Computational Fluid Dynamics (CFD) simulation and validated with the experimental results. Detailed parametric studies are conducted numerically on spar with single and two heave plates. Effects of scaling ratio (1-50), diameter ratio (1-2), heave plate position to diameter of heave plate ratio (0.2-1), heave plate position to draft ratio (0.2-0.8), relative spacing (0.2-1) and spacing between heave plates to draft ratio (0.2-0.8) are examined. Results show that the heave damping increases with increase in scaling ratio and diameter ratio. It is found that the diameter ratios of 1.2-1.4, position to diameter of heave plate ratio of 0.8, position to draft ratio of 0.4, relative spacings of 0.4-0.6 and spacing to draft ratios of 0.2-0.4 are more favorable conditions to reduce the heave motion. © 2016 Elsevier Ltd. All rights reserved.

Ocean Engineering

Heave damping of spar platform for offshore wind turbine with heave plate

Model studies on spar platform with 5MW wind turbine

Journal	Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE
Open Access	No