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|Title: ||Evaluation of the Effect of Ship Motion on Propeller Performance|
|Authors: ||Kuan-Chen Chen;Ching-Yeh Hsin;Ching-Pu Lee|
|Keywords: ||propeller in wave;ship motion;Boundary Element Method;RANS, body force|
|Issue Date: ||2018-06-29T02:48:19Z
|Publisher: ||Proceedings of the 6th PAAMES and AMEC 2014|
|Abstract: ||Abstract:Due to the environmental regulations, the fuel efficiency in seaway becomes more important. In this
paper, the effect of ship motion on propeller performance will be evaluated. The influence will be
divided into two different factors. The first one is the influence due to ship positions in seaway and the
induced velocity due to wave itself, and the second one is the interaction between the ship hull and the
propeller. The influence of the ship motion to the propeller performance is then the sum of these
factors. In this paper, the first factor is considered as mainly the potential flow factor, and the second
one is considered as mainly the viscous flow factor. We have assumed these factors are independent to
each other in this paper. For the effects of ship positions and the influence of wave itself, a potential
flow propeller unsteady flow boundary element method is used with a ship motion prediction program
for computations. For computing the interactions between the ship hull and propellers, the viscous
flow RANS method is adopted. Instead of using the real propeller geometry in RANS computations,
the body forces will be used to represent the propeller effects, and it is called the body force method.
A computational example is demonstrated to show that the body force method can successfully
simulate the interaction between the ship hull and a propeller. Computational examples are also
demonstrated for investigating the effects of ship positions in seaway on the propeller performances.
In this paper, we have established the first step to integrate ship motion computational method, the
propeller boundary element method, and the viscous flow RANS method to evaluate the propeller
performance in seaway.
|Appears in Collections:||[系統工程暨造船學系] 演講及研討會|
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