Details
| Originalsprache | Englisch |
|---|---|
| Titel des Sammelwerks | Proceedings of the ASME 37th International Conference on Ocean, Offshore and Arctic Engineering - 2018 |
| Herausgeber (Verlag) | American Society of Mechanical Engineers(ASME) |
| Band | 7A: Ocean Engineering |
| ISBN (elektronisch) | 9780791851265 |
| Publikationsstatus | Veröffentlicht - 2018 |
| Veranstaltung | ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2018 - Madrid, Spanien Dauer: 17 Juni 2018 → 22 Juni 2018 |
Abstract
Developments in marine aquaculture in the last 30 years indicate that the bivalve-related industry is feasible offshore and that opportunities for large-scale, industrious production of shellfish stock exists. The objective of the project "CAWX1607" is to develop, model and test such systems. However, the forces acting on suspension cultures, the most likely form of marine farm systems are unknown. Here, drag coefficients provide an efficient approach for the calculation of arbitrary complex structures by using the Morison equation. The CD-coefficients take into account vortex shedding effects as well as the surface roughness of the structure. This paper reports on developed and conducted tests at the medium wave and towing tank "Schneiderberg" (WKS) at the Ludwig-Franzius-Institute for Hydraulic, Estuarine and Coastal Engineering of the Leibniz University Hanover, Germany. The tests were conducted for current velocities between 0.25 - 1.0 m/s for three samples of blue-lipped mussel specimens. During physical testing the forces and moments in x-,y- and z-direction, the elevation of the water surface, a velocity profile in the vicinity of the live-blue mussels, as well as the velocities of the towing carriage were recorded. The developed methodology, data treatment as well as the resulting CD-coefficients are presented. Further, the CD-coefficients obtained are presented in the context of natural variation of living structures and discussed in comparison to CD - Curve characteristics of offshore structures, e.g. rough cylinders.
ASJC Scopus Sachgebiete
- Ingenieurwesen (insg.)
- Meerestechnik
- Energie (insg.)
- Energieanlagenbau und Kraftwerkstechnik
- Ingenieurwesen (insg.)
- Maschinenbau
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Proceedings of the ASME 37th International Conference on Ocean, Offshore and Arctic Engineering - 2018. Band 7A: Ocean Engineering American Society of Mechanical Engineers(ASME), 2018.
Publikation: Beitrag in Buch/Bericht/Sammelwerk/Konferenzband › Aufsatz in Konferenzband › Forschung › Peer-Review
}
TY - GEN
T1 - Drag coefficients of vertically-mounted full-scale blue mussel dropper lines
AU - Hildebrandt, Arndt
AU - Landmann, Jannis
AU - Ongsiek, Thorsten
AU - Goseberg, Nils
N1 - Funding information: This Research has been supported with funding from the New Zealand Ministry of Business, Innovation and Employment through Cawthron Institute project CAWX1607. Furthermore, the authors gratefully acknowledge the support of Prof. Dr. Bela H. Buck for providing us with insight into bivalves, from Dr.-Ing. Jens-André Paffenholz of the Geodetic Institute Hannover during 3D-scanning, from Dr. Tim Staufenberger for providing us with the mussel specimens and from Kevin Heathman on behalf of the Cawthron Institute for support regarding bivalve characteristics.
PY - 2018
Y1 - 2018
N2 - Developments in marine aquaculture in the last 30 years indicate that the bivalve-related industry is feasible offshore and that opportunities for large-scale, industrious production of shellfish stock exists. The objective of the project "CAWX1607" is to develop, model and test such systems. However, the forces acting on suspension cultures, the most likely form of marine farm systems are unknown. Here, drag coefficients provide an efficient approach for the calculation of arbitrary complex structures by using the Morison equation. The CD-coefficients take into account vortex shedding effects as well as the surface roughness of the structure. This paper reports on developed and conducted tests at the medium wave and towing tank "Schneiderberg" (WKS) at the Ludwig-Franzius-Institute for Hydraulic, Estuarine and Coastal Engineering of the Leibniz University Hanover, Germany. The tests were conducted for current velocities between 0.25 - 1.0 m/s for three samples of blue-lipped mussel specimens. During physical testing the forces and moments in x-,y- and z-direction, the elevation of the water surface, a velocity profile in the vicinity of the live-blue mussels, as well as the velocities of the towing carriage were recorded. The developed methodology, data treatment as well as the resulting CD-coefficients are presented. Further, the CD-coefficients obtained are presented in the context of natural variation of living structures and discussed in comparison to CD - Curve characteristics of offshore structures, e.g. rough cylinders.
AB - Developments in marine aquaculture in the last 30 years indicate that the bivalve-related industry is feasible offshore and that opportunities for large-scale, industrious production of shellfish stock exists. The objective of the project "CAWX1607" is to develop, model and test such systems. However, the forces acting on suspension cultures, the most likely form of marine farm systems are unknown. Here, drag coefficients provide an efficient approach for the calculation of arbitrary complex structures by using the Morison equation. The CD-coefficients take into account vortex shedding effects as well as the surface roughness of the structure. This paper reports on developed and conducted tests at the medium wave and towing tank "Schneiderberg" (WKS) at the Ludwig-Franzius-Institute for Hydraulic, Estuarine and Coastal Engineering of the Leibniz University Hanover, Germany. The tests were conducted for current velocities between 0.25 - 1.0 m/s for three samples of blue-lipped mussel specimens. During physical testing the forces and moments in x-,y- and z-direction, the elevation of the water surface, a velocity profile in the vicinity of the live-blue mussels, as well as the velocities of the towing carriage were recorded. The developed methodology, data treatment as well as the resulting CD-coefficients are presented. Further, the CD-coefficients obtained are presented in the context of natural variation of living structures and discussed in comparison to CD - Curve characteristics of offshore structures, e.g. rough cylinders.
KW - Aquaculture
KW - Drag coefficient
KW - Dropper lines
KW - Morison equation
KW - Physical modelling
UR - http://www.scopus.com/inward/record.url?scp=85055434466&partnerID=8YFLogxK
M3 - Conference contribution
VL - 7A: Ocean Engineering
BT - Proceedings of the ASME 37th International Conference on Ocean, Offshore and Arctic Engineering - 2018
PB - American Society of Mechanical Engineers(ASME)
T2 - ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2018
Y2 - 17 June 2018 through 22 June 2018
ER -