Multi-year assessment of Reynolds stress and turbulent kinetic energy at the European Marine Energy Centre in the absence of waves

Gareth Wakelam; Brian Sellar; Vengatesan Venugopal

Multi-year assessment of Reynolds stress and turbulent kinetic energy at the European Marine Energy Centre in the absence of waves

Gareth Wakelam, Brian Sellar, Vengatesan Venugopal

School of Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

To enable accurate prediction of performance, loading and lifetime fatigue,
the operating environment of tidal stream turbines must be
comprehensively characterised over a range of seasons and tidal cycles. The met-ocean dataset acquired at the European Marine Energy Centre (EMEC), UK as part of the Reliable Data Acquisition Platform for Tidal (ReDAPT) project
covers a multi-year period with multiple sensor deployments and
provides an opportunity to characterise both mean turbulent flow parameters and their statistical properties.

Results from the analysis of Reynolds stresses and turbulent kinetic energy density are presented along with corresponding statistical distributions at turbine hub-height. Two distinct methods of calculating turbulent kinetic energy density are compared and the need for accurate determination of turbulence anisotropy is discussed based on the resulting values. Evidence of consistent trends over inflow velocities and vertical position in the water column is presented, and ongoing work to quantify these trends described.

Original language	English
Title of host publication	The 4th Asian Wave and Tidal Energy Conference
Place of Publication	Taipei, Taiwan
Publication status	Published - 13 Sept 2018
Event	4th Asian Wave and Tidal Energy Conference - Taipei, Taiwan, Province of China Duration: 9 Sept 2018 → 13 Sept 2018 https://tethys.pnnl.gov/events/4th-asian-wave-and-tidal-energy-conference-awtec

Conference

Conference	4th Asian Wave and Tidal Energy Conference
Abbreviated title	AWTEC
Country/Territory	Taiwan, Province of China
City	Taipei
Period	9/09/18 → 13/09/18
Internet address	https://tethys.pnnl.gov/events/4th-asian-wave-and-tidal-energy-conference-awtec

IAA-Bureau Veritas: EPSRC Impact Acceleration Account (IAA). Marine met-ocean data and its use in the tidal energy industry: Bureau Veritas and The University of Edinburgh
Sellar, B. (Principal Investigator)
3/10/16 → 31/01/17
Project: University Awarded Project Funding
FloWTurb: Response of Tidal Energy Converters to Combined Tidal Flow, Waves, and Turbulence
Venugopal, V. (Principal Investigator) & Borthwick, A. (Co-investigator)
EPSRC
13/04/16 → 31/10/19
Project: Research
IAA-Alstom: EPSRC Impact Accelerator Account (IAA). Leveraging the ReDAPT Project: Exploitation of the Alstom-University of Edinburgh marine energy data set.
Sellar, B. (Principal Investigator)
2/03/15 → 1/03/16
Project: University Awarded Project Funding

Cite this

@inproceedings{99c1e4cf612743bfb057d518a480dc9f,

title = "Multi-year assessment of Reynolds stress and turbulent kinetic energy at the European Marine Energy Centre in the absence of waves",

abstract = "To enable accurate prediction of performance, loading and lifetime fatigue, the operating environment of tidal stream turbines must be comprehensively characterised over a range of seasons and tidal cycles. The met-ocean dataset acquired at the European Marine Energy Centre (EMEC), UK as part of the Reliable Data Acquisition Platform for Tidal (ReDAPT) project covers a multi-year period with multiple sensor deployments and provides an opportunity to characterise both mean turbulent flow parameters and their statistical properties.Results from the analysis of Reynolds stresses and turbulent kinetic energy density are presented along with corresponding statistical distributions at turbine hub-height. Two distinct methods of calculating turbulent kinetic energy density are compared and the need for accurate determination of turbulence anisotropy is discussed based on the resulting values. Evidence of consistent trends over inflow velocities and vertical position in the water column is presented, and ongoing work to quantify these trends described.",

author = "Gareth Wakelam and Brian Sellar and Vengatesan Venugopal",

note = "Acceptance date set to exclude from REF OA Policy; 4th Asian Wave and Tidal Energy Conference, AWTEC ; Conference date: 09-09-2018 Through 13-09-2018",

year = "2018",

month = sep,

day = "13",

language = "English",

booktitle = "The 4th Asian Wave and Tidal Energy Conference",

url = "https://tethys.pnnl.gov/events/4th-asian-wave-and-tidal-energy-conference-awtec",

}

TY - GEN

T1 - Multi-year assessment of Reynolds stress and turbulent kinetic energy at the European Marine Energy Centre in the absence of waves

AU - Wakelam, Gareth

AU - Sellar, Brian

AU - Venugopal, Vengatesan

N1 - Acceptance date set to exclude from REF OA Policy

PY - 2018/9/13

Y1 - 2018/9/13

N2 - To enable accurate prediction of performance, loading and lifetime fatigue, the operating environment of tidal stream turbines must be comprehensively characterised over a range of seasons and tidal cycles. The met-ocean dataset acquired at the European Marine Energy Centre (EMEC), UK as part of the Reliable Data Acquisition Platform for Tidal (ReDAPT) project covers a multi-year period with multiple sensor deployments and provides an opportunity to characterise both mean turbulent flow parameters and their statistical properties.Results from the analysis of Reynolds stresses and turbulent kinetic energy density are presented along with corresponding statistical distributions at turbine hub-height. Two distinct methods of calculating turbulent kinetic energy density are compared and the need for accurate determination of turbulence anisotropy is discussed based on the resulting values. Evidence of consistent trends over inflow velocities and vertical position in the water column is presented, and ongoing work to quantify these trends described.

AB - To enable accurate prediction of performance, loading and lifetime fatigue, the operating environment of tidal stream turbines must be comprehensively characterised over a range of seasons and tidal cycles. The met-ocean dataset acquired at the European Marine Energy Centre (EMEC), UK as part of the Reliable Data Acquisition Platform for Tidal (ReDAPT) project covers a multi-year period with multiple sensor deployments and provides an opportunity to characterise both mean turbulent flow parameters and their statistical properties.Results from the analysis of Reynolds stresses and turbulent kinetic energy density are presented along with corresponding statistical distributions at turbine hub-height. Two distinct methods of calculating turbulent kinetic energy density are compared and the need for accurate determination of turbulence anisotropy is discussed based on the resulting values. Evidence of consistent trends over inflow velocities and vertical position in the water column is presented, and ongoing work to quantify these trends described.

M3 - Conference contribution

BT - The 4th Asian Wave and Tidal Energy Conference

CY - Taipei, Taiwan

T2 - 4th Asian Wave and Tidal Energy Conference

Y2 - 9 September 2018 through 13 September 2018

ER -

Multi-year assessment of Reynolds stress and turbulent kinetic energy at the European Marine Energy Centre in the absence of waves

Abstract

Conference

Fingerprint

Projects

IAA-Bureau Veritas: EPSRC Impact Acceleration Account (IAA). Marine met-ocean data and its use in the tidal energy industry: Bureau Veritas and The University of Edinburgh

FloWTurb: Response of Tidal Energy Converters to Combined Tidal Flow, Waves, and Turbulence

IAA-Alstom: EPSRC Impact Accelerator Account (IAA). Leveraging the ReDAPT Project: Exploitation of the Alstom-University of Edinburgh marine energy data set.

Cite this