Airflow distortion at anemometer sites on the OWS Polarfront
Airflow distortion at anemometer sites on the OWS Polarfront
Accurate wind speed measurements from anemometers on research ships are required to obtain high quality air-sea flux measurements. However, the measurements can be biased by the distortion of the airflow over the ship, i.e. the wind speed can either be accelerated or decelerated by the presence of the ship and the flow of air can be displaced vertically over the ship's superstructure. The computational fluid dynamics software VECTIS was used to numerically simulate the airflow over the Ocean Weather Ship Polarfront. The airflow distortion at six anemometer sites has been quantified for a wind speed of 10 ms-1 blowing a) directly over the bows of the ship and b) over the ship’s starboard beam. The wind speed errors ranged from
decelerations of about 1 % for an airflow directly over the bow to accelerations of 10 % for the beam-on flow.
National Oceanography Centre
Moat, B.I.
497dbb18-a98f-466b-b459-aa2c872ad2dc
Yelland, M.J.
3b2e2a38-334f-430f-b110-253a0a835a07
February 2009
Moat, B.I.
497dbb18-a98f-466b-b459-aa2c872ad2dc
Yelland, M.J.
3b2e2a38-334f-430f-b110-253a0a835a07
Moat, B.I. and Yelland, M.J.
(2009)
Airflow distortion at anemometer sites on the OWS Polarfront
(National Oceanography Centre Southampton Internal Document, 14)
Southampton, UK.
National Oceanography Centre
35pp.
Record type:
Monograph
(Project Report)
Abstract
Accurate wind speed measurements from anemometers on research ships are required to obtain high quality air-sea flux measurements. However, the measurements can be biased by the distortion of the airflow over the ship, i.e. the wind speed can either be accelerated or decelerated by the presence of the ship and the flow of air can be displaced vertically over the ship's superstructure. The computational fluid dynamics software VECTIS was used to numerically simulate the airflow over the Ocean Weather Ship Polarfront. The airflow distortion at six anemometer sites has been quantified for a wind speed of 10 ms-1 blowing a) directly over the bows of the ship and b) over the ship’s starboard beam. The wind speed errors ranged from
decelerations of about 1 % for an airflow directly over the bow to accelerations of 10 % for the beam-on flow.
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NOCS_ID14.pdf
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More information
Published date: February 2009
Additional Information:
Internal Document deposted at request of B.I. Moat
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Local EPrints ID: 65693
URI: http://eprints.soton.ac.uk/id/eprint/65693
PURE UUID: f366e9bc-27f3-49dc-9155-30524837b22f
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Date deposited: 10 Mar 2009
Last modified: 09 Apr 2024 16:30
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Contributors
Author:
B.I. Moat
Author:
M.J. Yelland
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