Design and fabrication of fluid flow characteristic controllable trawl door using a trailing edge flap
A novel trawl door with a trailing edge flap and a trawl door with a hydrophobic surface are proposed to improve the hydrodynamic characteristics of trawl doors. In the former, the flap angle was designed to accommodate rapid changes in water flow velocity, increase the lift force under low-speed co...
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Published in | Journal of mechanical science and technology Vol. 33; no. 12; pp. 5623 - 5630 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Seoul
Korean Society of Mechanical Engineers
01.12.2019
Springer Nature B.V 대한기계학회 |
Subjects | |
Online Access | Get full text |
ISSN | 1738-494X 1976-3824 |
DOI | 10.1007/s12206-019-1103-6 |
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Summary: | A novel trawl door with a trailing edge flap and a trawl door with a hydrophobic surface are proposed to improve the hydrodynamic characteristics of trawl doors. In the former, the flap angle was designed to accommodate rapid changes in water flow velocity, increase the lift force under low-speed conditions, and decrease drag force under high-speed conditions. An evaluation of the hydrodynamic characteristics at different flap angles was conducted through numerical analyses and experimentation. The design of the trawl door with coated hydrophobic surface aims to reduce flow resistance. Both trawl door designs were validated in a circulating water channel ex-periment. At these angles of the trailing edge flap, a 31 % decrement in drag force was observed in the circulating water channel experi-ment, and a 21.3 % decrement in flow resistance was observed when the surface of the trawl door was coated with hydrophobic surface materials. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 |
ISSN: | 1738-494X 1976-3824 |
DOI: | 10.1007/s12206-019-1103-6 |