Bubble sweep-down occurrence characterization on Research Vessels

Type Article
Date 2016-01
Language English
Author(s) Delacroix Sylvain1, Germain GregoryORCID1, Berger LaurentORCID2, Billard Jean-Yves3
Affiliation(s) 1 : IFREMER, Marine Struct Lab, F-62321 Boulogne Sur Mer, France.
2 : IFREMER, IMN NSE AS, F-29280 Plouzane, France.
3 : IRENAV, Ecole Navale, F-29240 Brest, France.
Source Ocean Engineering (0029-8018) (Pergamon-elsevier Science Ltd), 2016-01 , Vol. 111 , P. 34-42
DOI 10.1016/j.oceaneng.2015.10.040
WOS© Times Cited 14
Keyword(s) Bubble sweep-down, Acoustic perturbation, Ship motion
Abstract Bubble sweep-down on oceanographic vessels generates acoustic perturbations. We propose in this work to characterize the sub-surface bubbles occurrence conditions from acoustic data analysis acquired during surveys in relatively shallow water with the IFREMER research vessels Thalassa and Pourquoi Pas?. The methodology of data analysis used in this work allows us to characterize the sailing conditions influence on bubble sweep-down occurrence. The correlation between sailing conditions and acoustic perturbations tends to demonstrate that the presence of bubbles under the hull is clearly related to the wind speed and natural aeration, and that surface bubbles are advected differently in the water column by the two vessels
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