Experimental and numerical study of the turbulence characteristics of air flow around a research vessel
Résumé
Airow distortion by research vessels has been shown to signicantly affect micro-meteorological
measurements. This study uses an efficient time-dependent Large Eddy Simulation numerical technique
to investigate the effect of the research vessel Tangaroa on both the mean and turbulent
characteristics of airflow. Detailed comparison is given between the numerical results and an extensive
experimental dataset. The study is performed for the whole range of relative wind directions
and for instruments located in regions of high and low flow distortion. The experimental data show
that both the normalised wind speed and normalised standard deviation are only weakly dependent
on wind speed, ship speed, ship motion and sea state, but strongly dependent on relative wind
direction. Very good agreement is obtained between the experimental and numerical data for the
mean flow, standard deviation and turbulence spectra, even in areas of strong turbulence.
Domaines
Océanographie
Origine : Fichiers produits par l'(les) auteur(s)
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