Influence of ship attitude change predicted by&nbsp;&nbsp;theoretical and numerical methods on&nbsp;propeller's unsteady bearing force

YAO Hui-lan; ZHANG Huai-xin

doi:10.16411/j.cnki.issn1006-7736.2018.03.001

Journal of Dalian Maritime University >

2018 , Vol. 44 >Issue 3: 1 - 8

DOI: https://doi.org/10.16411/j.cnki.issn1006-7736.2018.03.001

Influence of ship attitude change predicted by theoretical and numerical methods on propeller's unsteady bearing force

YAO Hui-lan ,
ZHANG Huai-xin

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( State Key Laboratory of Ocean Engineering/Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration (CISSE),Shanghai Jiao Tong University,Shanghai 200240, China)

Received date: 2018-01-19

Revised date: 2018-02-26

Online published: 2024-06-27

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Abstract

The unsteady bearing force of propeller under two different positions was predicted and its harmonic component was studied. Based on this, the influence of ship attitude change on unsteady propeller bearing forces was studied. Results show that when the ship attitude changes (trim and draft increase), the amplitudes of low harmonics of the wake at the propeller plane increase, which makes the amplitudes of threedimension bearing forces increase to some extent. Among them, the transvers force increase obviously. In addition, the results prove that the quasisteady method is capable of predicting unsteady propeller bearing force of the ship with different attitude and also the amplitude change of propeller bearing force caused by ship attitude change. The method of simulating the ship and the propeller separately can also accurately predict propeller bearing forces of the ship with different attitudes.

Key words： ship attitude; propeller; bearing forces; ship wake; harmonic componet; computational fluid dynamics

Cite this article

YAO Hui-lan , ZHANG Huai-xin . Influence of ship attitude change predicted by theoretical and numerical methods on propeller's unsteady bearing force[J]. Journal of Dalian Maritime University, 2018 , 44(3) : 1 -8 . DOI: 10.16411/j.cnki.issn1006-7736.2018.03.001

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