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Volume 15, Issue 30 (1-2020)
Marine Engineering 2020, 15(30): 139-150 |
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Yari E, Barati Moghadam A. Boundary element method development for modeling of two-phase flow around the surface piercing propeller with regard to cross-flow effect. Marine Engineering 2020; 15 (30) :139-150
URL: http://marine-eng.ir/article-1-753-en.html
URL: http://marine-eng.ir/article-1-753-en.html
1-
2- Maleke Ashtar University of Technology
2- Maleke Ashtar University of Technology
Abstract: (3642 Views)
Design and analysis of the semi-submersible propeller due to meet with geometric and hydrodynamic parameters such as profile cross-section of blades, cavitation, ventilation, the effect of free surface and multiphase flow is very complicated. Designed and optimized for the semi-submersible propeller propulsion systems, requiring the solver is able to consider all the geometric parameters and flow in a short time with accurate results. In this paper, analyzes of the semi-submersible propeller using the boundary element method has been developed. Wake in the downstream of SPP is modeling and boundary condition using Taylor expansion and taking into account the long wave length is extracted. The results compared with experimental data shows that the boundary element method capable for analysis of SPP and using obtained numerical results by this method, the separation of initial, transient and fully ventilated areas during the rotation of the semi-submersible propeller is possible. In this paper, cross-flow effect on local results is discussed. By comparing the performance results of the propeller with considering the cross flow effect, the error reduction at low advanced coefficients is observed.
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