... resistance resistance reduction configuration resistance reduction rate transom edge reduction conventional stern flap bare hull upstream oil & gas stern flap flap flap0 design speed resistance performance model test correspond chord length flap configuration stern-fit flap...

... 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...

... 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...

... 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...

.... 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...

... 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...

... 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...

... 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...

..., 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...

... 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...

..., 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...

... 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...

... 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...

... was carried out by a wind tunnel. The wind tunnel with a diameter of 1.8 m is open jet type. The rotor has three straight blades with a profile of NACA4518, a chord length of 100 mm, a diameter of 600 mm and a blade height of 700 mm. The guide vane consists of some arc plates. The wind velocity is constant...

... 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...

... 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...

..., 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...

... in the experiment. Denoting the chord length of blade as L, number of blades as Z, and radius of turbine as R, the solidity o of a Darrieus turbine is defined by ZL o . . . . . (1) 2rcR Accordingly, the solidity is one of indicators to represent the effects of dimension, profile and number of blades...

... a series of diamond bird beak T -joints were analysed, where chord length, width ratio and chord slenderness are all varied. Using these results, this paper develops an idea by GJ. van der Vegte and adapts it to diamond bird beak joints so that an interaction contour is produced . which relates the local...

... 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...