Hydrodynamic response of the deep turbine installation-floating concept
Hydrodynamic response of the deep turbine installation-floating concept
Floating offshore wind turbine (FOWT) installations are progressing from the R&D stage to commercial installation projects. The prospective sites are situated in increasingly deeper water and further away from the shore. This paper presents the Deep Turbine Installation-Floating (DTI-F) concept, an innovative hybrid spar buoy-based FOWT capable of being able to raise and lower the tower and nacelle, which simplifies construction, installation, maintenance and decommissioning. The study is focused on the hydrodynamics of the moored floating system, and it is based on experimental and numerical modelling work. A 1:45 Froude scaled model of the DTI-F wind concept was tested using three different mooring configurations: i) three mooring lines, ii) four mooring lines, and iii) three mooring lines with a delta connection. Free decay and stiffness decay tests were carried out together with regular and irregular wave tests. The numerical study comprises diffraction (ANSYS AQWA) and time-domain modelling (OrcaFlex).
The experimental hydrostatic and hydrodynamic results are compared with the numerical simulations based on the as-built scale model. Considering the natural frequencies results obtained for the three mooring configurations, the three lines configuration without delta connection was selected as the most suitable design. The obtained results for the three mooring lines configuration show good agreement between the experiment and numerical simulations. The presented analysis of the design concept indicates a high degree of technical feasibility.
The American Society of Mechanical Engineers
Serret, Jordi
1afe1b31-7351-4308-8567-8c636e13dba8
Stratford, Tim
8dfb9e51-5b0c-43da-a69f-cb82175b8eb1
Thies, Philipp R.
a7959843-0b18-4a42-86fa-aca643babaf9
Venugopal, Vengatesan
9f6487c4-9758-4c7f-b04d-c9d958f7d3a8
Tezdogan, Tahsin
7e7328e2-4185-4052-8e9a-53fd81c98909
3 December 2019
Serret, Jordi
1afe1b31-7351-4308-8567-8c636e13dba8
Stratford, Tim
8dfb9e51-5b0c-43da-a69f-cb82175b8eb1
Thies, Philipp R.
a7959843-0b18-4a42-86fa-aca643babaf9
Venugopal, Vengatesan
9f6487c4-9758-4c7f-b04d-c9d958f7d3a8
Tezdogan, Tahsin
7e7328e2-4185-4052-8e9a-53fd81c98909
Serret, Jordi, Stratford, Tim, Thies, Philipp R., Venugopal, Vengatesan and Tezdogan, Tahsin
(2019)
Hydrodynamic response of the deep turbine installation-floating concept.
In ASME 2019 Power Conference, Salt Lake City, United States, 15/07/19.
The American Society of Mechanical Engineers.
9 pp
.
(doi:10.1115/POWER2019-1849).
Record type:
Conference or Workshop Item
(Paper)
Abstract
Floating offshore wind turbine (FOWT) installations are progressing from the R&D stage to commercial installation projects. The prospective sites are situated in increasingly deeper water and further away from the shore. This paper presents the Deep Turbine Installation-Floating (DTI-F) concept, an innovative hybrid spar buoy-based FOWT capable of being able to raise and lower the tower and nacelle, which simplifies construction, installation, maintenance and decommissioning. The study is focused on the hydrodynamics of the moored floating system, and it is based on experimental and numerical modelling work. A 1:45 Froude scaled model of the DTI-F wind concept was tested using three different mooring configurations: i) three mooring lines, ii) four mooring lines, and iii) three mooring lines with a delta connection. Free decay and stiffness decay tests were carried out together with regular and irregular wave tests. The numerical study comprises diffraction (ANSYS AQWA) and time-domain modelling (OrcaFlex).
The experimental hydrostatic and hydrodynamic results are compared with the numerical simulations based on the as-built scale model. Considering the natural frequencies results obtained for the three mooring configurations, the three lines configuration without delta connection was selected as the most suitable design. The obtained results for the three mooring lines configuration show good agreement between the experiment and numerical simulations. The presented analysis of the design concept indicates a high degree of technical feasibility.
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Published date: 3 December 2019
Venue - Dates:
ASME 2019 Power Conference, Snowbird Resort, Salt Lake City, United States, 2019-07-15 - 2019-07-18
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Local EPrints ID: 479157
URI: http://eprints.soton.ac.uk/id/eprint/479157
PURE UUID: 5013a9a3-f6ad-4e19-99e3-37f94cc76dca
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Date deposited: 20 Jul 2023 16:40
Last modified: 17 Mar 2024 04:18
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Author:
Jordi Serret
Author:
Tim Stratford
Author:
Philipp R. Thies
Author:
Vengatesan Venugopal
Author:
Tahsin Tezdogan
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