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http://dx.doi.org/10.3744/SNAK.2013.50.5.282

Numerical Study on the Effects of Combination of Blade Number for Shaft Forces and Moments of Contra-Rotating Propeller  

Paik, Kwang-Jun (Samsung Ship Model Basin (SSMB), Samsung Heavy Industries Co., Ltd.)
Lee, Jinsuk (Samsung Ship Model Basin (SSMB), Samsung Heavy Industries Co., Ltd.)
Lee, Taegu (Samsung Ship Model Basin (SSMB), Samsung Heavy Industries Co., Ltd.)
Hoshino, Tetsuji (Samsung Ship Model Basin (SSMB), Samsung Heavy Industries Co., Ltd.)
Park, Hyung-Gil (Samsung Ship Model Basin (SSMB), Samsung Heavy Industries Co., Ltd.)
Seo, Jongsoo (Samsung Ship Model Basin (SSMB), Samsung Heavy Industries Co., Ltd.)
Publication Information
Journal of the Society of Naval Architects of Korea / v.50, no.5, 2013 , pp. 282-290 More about this Journal
Abstract
The effects of the combination of blade number for forward and after propeller on the propeller shaft forces of a contra-rotating propeller (CRP) system are presented in the paper. The research is performed through the numerical simulations based on the Reynolds-Averaged Navier-Stokes equations (RANS). The simulation results of the present method in open water condition are validated comparing with the experimental data as well as the other numerical simulation results based on the potential method for 4-0-4 CRP (3686+3687A) and 4-0-5 CRP (3686+3849) of DTNSRDC. Two sets of CRP are designed and simulated to study the effect of the combination of blade number in behind-hull condition. One set consists of 3-blade and 4-blade, while the other is 4-blade and 4-blade. A full hull body submerged under the free surface is modeled in the computational domain to simulate directly the wake field of the ship at the propeller plane. From the simulation results, the fluctuations of axial force and moment are dominant in the case of same blade numbers for forward and after propellers, whereas the fluctuations of horizontal and vertical forces and moments are very large in the case of different blade numbers.
Keywords
Contra-rotating propeller; Shaft force; RANS(Reynolds-Averaged Navier-Stokes equations); Computational Fluid Dynamics(CFD);
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