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Keywords: chord length
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Proceedings Papers

Paper presented at the The 31st International Ocean and Polar Engineering Conference, June 20–25, 2021
Paper Number: ISOPE-I-21-4170
.... An optimization of flap geometry using a quasi-random algorithm is conducted with the chord length and the flap angle as design variables to investigate their hydrodynamic difference induced by the surface shape. It turns out that stern-fit flaps have an overall advantage over conventional flaps in resistance...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-098
... applied to design unbounded ducted turbines and the effect of duct shapes (angle of attack, camber, chord length and thickness) on the power coefficient is studied. Then, ducted turbines placed in a cylindrical channel are designed by this method, built by a 3D printer and tested in a water flume...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-042
... number model test chord length optimization multiple airfoil blade wind energy wind turbine model blade thrust prototype The Optimization Design Method of Multiple Airfoils Model Blades Zhe Chen1,2,3, Yanping He1,2,3*, Yadong Liu1,2,3, Yongsheng Zhao1,2,3 and Chong He4 1. State Key...
Proceedings Papers

Paper presented at the The 27th International Ocean and Polar Engineering Conference, June 25–30, 2017
Paper Number: ISOPE-I-17-397
.... The prescribed pitching motion is controlled by a servo motor from a control board. The chord length of each hydrofoil is 200 mm, halfspan length is 600 mm, and the flapping arm length is 375 mm [Kim, 2015]. To reduce tip-losses end-plates are attached to each end of the hydrofoils. In the second phase...
Proceedings Papers

Paper presented at the The 27th International Ocean and Polar Engineering Conference, June 25–30, 2017
Paper Number: ISOPE-I-17-047
... of the model blade was nearly 1.5 meter, so the velocity varies greatly from bottom to tip. Equally splitting the model blade blade-wised into eight regions, and CL and CD can be computed based on Re of these regions. The chord length of blade set 80mm to estimate the value of regions Re. Surely...
Proceedings Papers

Paper presented at the The 26th International Ocean and Polar Engineering Conference, June 26–July 2, 2016
Paper Number: ISOPE-I-16-046
... research field. fluctuation cavity cloudy cavity sg model smagorinsky-lilly model upstream oil & gas sequence time history uran result drag coefficient experimental result detachment different sg model chord length wale model coefficient main frequency frequency wmle model...
Proceedings Papers

Paper presented at the The 26th International Ocean and Polar Engineering Conference, June 26–July 2, 2016
Paper Number: ISOPE-I-16-295
... ratio A area [m2] a interference factor BEM blade element momentum c chord length [m] CD drag coefficient CL lift coefficient CN normal force coefficient CP power coefficient CT tangential force coefficient D diameter [m] DMST double multiple streamtube FN normal force [N] FT tangential force [N] Fx...
Proceedings Papers

Paper presented at the The Twenty-fifth International Ocean and Polar Engineering Conference, June 21–26, 2015
Paper Number: ISOPE-I-15-848
... generation system at low current velocity in China and oversea. chord length optimization design ocean energy variable propeller pitch system transmission system turbine tidal power system schematic diagram blade element tidal turbine generator startup velocity renewable energy current...
Proceedings Papers

Paper presented at the The Twenty-fourth International Ocean and Polar Engineering Conference, June 15–20, 2014
Paper Number: ISOPE-I-14-491
... to thickness ratio, 18.75, 25, 37.5, 50), i.e., 16 T-joints are investigated. Five α (ratio of chord length to radius, 12, 18, 24, 30, 36) values are considered. The finite element results show that the axial strength of each T-joint changes with a very slightly. Therefore this boundary condition...
Proceedings Papers

Paper presented at the The Twenty-fourth International Ocean and Polar Engineering Conference, June 15–20, 2014
Paper Number: ISOPE-I-14-061
..., MNU26, has a 26% thickness to chord length ratio that can be applied throughout the blade length. Cavitation is also investigated for the MNU26 hydrofoil. Results show that the MNU26 hydrofoil has higher lift coefficients and also a higher lift to drag ratio in contrast to S814 and DU91-W2-250...
Proceedings Papers

Paper presented at the The Twenty-third International Offshore and Polar Engineering Conference, June 30–July 5, 2013
Paper Number: ISOPE-I-13-350
..., the typical towing tank model tests are carried out at the towing tank. bare hull 0 duct reduction propeller efficiency duct radius lower chord length resistance test condition hull form variation self-propulsion parameter power reduction resistance reduction section profile chord length...
Proceedings Papers

Paper presented at the The Twenty-third International Offshore and Polar Engineering Conference, June 30–July 5, 2013
Paper Number: ISOPE-I-13-083
... thrust by choosing the blade chord length and twist angle as optimization variables. basin test froude naca 4412 reynolds number wind energy airfoil wind speed chord length drag coefficient compressors engines and turbines artificial intelligence prototype optimization problem model...
Proceedings Papers

Paper presented at the The Twentieth International Offshore and Polar Engineering Conference, June 20–25, 2010
Paper Number: ISOPE-I-10-426
... in the future is eminent. Tidal stream generation while still at its infancy looks promising to offer its share to meet this future demand. vamct solidity renewable energy marine current turbine yong chord length speed ratio rotor simulation time bypass mesh tip speed ratio vortex model...
Proceedings Papers

Paper presented at the The Nineteenth International Offshore and Polar Engineering Conference, July 21–26, 2009
Paper Number: ISOPE-I-09-131
... wind turbine power coefficient wind energy guide vane solidity coefficient rotor vane renewable energy turbine characteristic wind velocity turbine guide vane guide vane row rotational speed ratio experiment wind tunnel takao chord length The objective of this study...
Proceedings Papers

Paper presented at the The Fifteenth International Offshore and Polar Engineering Conference, June 19–24, 2005
Paper Number: ISOPE-I-05-079
... clearance of turbine blade, and borrowed from ring-type propeller housed in duct for special purpose marine vehicles. simple penetration chord length calculation impulse turbine rotor blade ocean energy suction side wave energy conversion efficiency experiment end plate hyun cooper-type...
Proceedings Papers

Paper presented at the The Fifteenth International Offshore and Polar Engineering Conference, June 19–24, 2005
Paper Number: ISOPE-I-05-394
..., presents the effect of chord length, boundary conditions and chord end conditions on the strength of uniplanar T-joints. Comparisons are made with the new T-joint strength formulations developed by API (2003) and ISO (2004). Finally, a simple ultimate strength equation is proposed for uniplanar T-joints...
Proceedings Papers

Paper presented at the The Ninth International Offshore and Polar Engineering Conference, May 30–June 4, 1999
Paper Number: ISOPE-I-99-356
..., IPB and OPB brace loadings, as well as unbalanced W-/E-Brace tension loadings from the finite element analysis. Table 3 gives the detailed SCF results of the simulated XT-joint specimen under each load conditions. For easy comparison with the tested SCFs, the chord length parameter a used...
Proceedings Papers

Paper presented at the The Ninth International Offshore and Polar Engineering Conference, May 30–June 4, 1999
Paper Number: ISOPE-I-99-019
... velocity ocean energy chord length solidity rotational speed darrieus turbine tidal power generation power generation tip speed ratio torque efficiency experiment characteristic wind mill shiono maximum output renewable energy camber line turbine water turbine rotation 0 Proceedings...
Proceedings Papers

Paper presented at the The Sixth International Offshore and Polar Engineering Conference, May 26–31, 1996
Paper Number: ISOPE-I-96-247
... ABSTRACT Conventional expressions for the strength of T -joints do not allow for the interaction between chord bending and the local joint strength. Using finite element methods a series of diamond bird beak T -joints were analysed, where chord length, width ratio and chord slenderness are all...
Proceedings Papers

Paper presented at the The Sixth International Offshore and Polar Engineering Conference, May 26–31, 1996
Paper Number: ISOPE-I-96-263
... a can has led to an expression for the influence of the can length on the static strength of axially loaded muItiplanar XX-joints. Furthermore, it has been shown that the expression describing the influence of the can length and the one derived for the influence of a (chord length) are in principle...

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