High porosity net drag at a low angle of attack in application to a representative prawn trawl
The presented work investigated the extent by which Reynolds number determines the drag coefficient for high porosity nets at a low angle of attack. A simple prawn trawl model that incorporates the main design features of prawn trawls employed in Australia was developed. Four trawl models of various...
| Published in: | Volume 7: Ocean Space Utilization; Ocean Renewable Energy |
|---|---|
| Main Authors: | , , , |
| Format: | Conference Object |
| Language: | English |
| Published: |
American Society for Mechanical Engineers (ASME)
2012
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| Subjects: | |
| Online Access: | https://doi.org/10.1115/OMAE2012-83083 http://ecite.utas.edu.au/79059 |
| _version_ | 1821792726585180160 |
|---|---|
| author | Balash, C Bose, N Binns, J Sterling, D |
| author_facet | Balash, C Bose, N Binns, J Sterling, D |
| author_sort | Balash, C |
| collection | Unknown |
| container_start_page | 1 |
| container_title | Volume 7: Ocean Space Utilization; Ocean Renewable Energy |
| description | The presented work investigated the extent by which Reynolds number determines the drag coefficient for high porosity nets at a low angle of attack. A simple prawn trawl model that incorporates the main design features of prawn trawls employed in Australia was developed. Four trawl models of various high porosities were tested in a flume tank with respect to drag and shape over a range of flow velocities. The physical trawl model was analysed as a system of independent plane net sheets, each with an orientation to the flow estimated from analysis of stereo-vision data. The main finding was that the drag coefficient was weakly dependent on the Reynolds number in the range typical for prawn trawl operations, 1000 < Re < 1700 . These combined findings imply that trawler operators can approximately estimate prawn net drag from a function containing trawl twine area, towing speed and spread ratio. |
| format | Conference Object |
| genre | Arctic |
| genre_facet | Arctic |
| id | ftunivtasecite:oai:ecite.utas.edu.au:79059 |
| institution | Open Polar |
| language | English |
| op_collection_id | ftunivtasecite |
| op_container_end_page | 6 |
| op_doi | https://doi.org/10.1115/OMAE2012-83083 |
| op_relation | Balash, C and Bose, N and Binns, J and Sterling, D, High porosity net drag at a low angle of attack in application to a representative prawn trawl, Proceedings of the 31st International Conference on Ocean, Offshore and Arctic Engineering, 1-6 July 2012, Rio de Janeiro, Brazil, pp. 1-6. ISBN 978-0-7918-4494-6 (2012) [Refereed Conference Paper] http://ecite.utas.edu.au/79059 |
| publishDate | 2012 |
| publisher | American Society for Mechanical Engineers (ASME) |
| record_format | openpolar |
| spelling | ftunivtasecite:oai:ecite.utas.edu.au:79059 2025-01-16T19:55:56+00:00 High porosity net drag at a low angle of attack in application to a representative prawn trawl Balash, C Bose, N Binns, J Sterling, D 2012 https://doi.org/10.1115/OMAE2012-83083 http://ecite.utas.edu.au/79059 en eng American Society for Mechanical Engineers (ASME) Balash, C and Bose, N and Binns, J and Sterling, D, High porosity net drag at a low angle of attack in application to a representative prawn trawl, Proceedings of the 31st International Conference on Ocean, Offshore and Arctic Engineering, 1-6 July 2012, Rio de Janeiro, Brazil, pp. 1-6. ISBN 978-0-7918-4494-6 (2012) [Refereed Conference Paper] http://ecite.utas.edu.au/79059 Engineering Maritime Engineering Ocean Engineering Refereed Conference Paper PeerReviewed 2012 ftunivtasecite https://doi.org/10.1115/OMAE2012-83083 2019-12-13T21:44:44Z The presented work investigated the extent by which Reynolds number determines the drag coefficient for high porosity nets at a low angle of attack. A simple prawn trawl model that incorporates the main design features of prawn trawls employed in Australia was developed. Four trawl models of various high porosities were tested in a flume tank with respect to drag and shape over a range of flow velocities. The physical trawl model was analysed as a system of independent plane net sheets, each with an orientation to the flow estimated from analysis of stereo-vision data. The main finding was that the drag coefficient was weakly dependent on the Reynolds number in the range typical for prawn trawl operations, 1000 < Re < 1700 . These combined findings imply that trawler operators can approximately estimate prawn net drag from a function containing trawl twine area, towing speed and spread ratio. Conference Object Arctic Unknown Volume 7: Ocean Space Utilization; Ocean Renewable Energy 1 6 |
| spellingShingle | Engineering Maritime Engineering Ocean Engineering Balash, C Bose, N Binns, J Sterling, D High porosity net drag at a low angle of attack in application to a representative prawn trawl |
| title | High porosity net drag at a low angle of attack in application to a representative prawn trawl |
| title_full | High porosity net drag at a low angle of attack in application to a representative prawn trawl |
| title_fullStr | High porosity net drag at a low angle of attack in application to a representative prawn trawl |
| title_full_unstemmed | High porosity net drag at a low angle of attack in application to a representative prawn trawl |
| title_short | High porosity net drag at a low angle of attack in application to a representative prawn trawl |
| title_sort | high porosity net drag at a low angle of attack in application to a representative prawn trawl |
| topic | Engineering Maritime Engineering Ocean Engineering |
| topic_facet | Engineering Maritime Engineering Ocean Engineering |
| url | https://doi.org/10.1115/OMAE2012-83083 http://ecite.utas.edu.au/79059 |