Experimental investigation of the effects of blade geometry on pressure fluctuation and noise of tunnel thrusters

Cheng YuState Key Laboratory of Ocean Engineering, Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai Jiao Tong University, Shanghai, People’s Republic of ChinaCorrespondence[email protected]

http://orcid.org/0000-0002-4495-8793

Xiao-Qian DongState Key Laboratory of Ocean Engineering, Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai Jiao Tong University, Shanghai, People’s Republic of China

Chen-Jun YangState Key Laboratory of Ocean Engineering, Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai Jiao Tong University, Shanghai, People’s Republic of China

Wei LiState Key Laboratory of Ocean Engineering, Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai Jiao Tong University, Shanghai, People’s Republic of China

Francis NoblesseState Key Laboratory of Ocean Engineering, Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai Jiao Tong University, Shanghai, People’s Republic of China

ABSTRACT

Tunnel thrusters are more vulnerable to cavitation due to the tip clearance flow, blockage effect of the gearbox, and heavy blade loads as compared with open propellers, which makes the problems of structure vibration and radiated noise more serious. Unfortunately, there are few public sources of relevant experimental study. In this context, model experiments have been carried out in the cavitation tunnel of the Shanghai Jiao Tong University to investigate the effects of blade geometry on pressure fluctuation and noise. The experimental results indicate that the traditional ‘flat plate’ blade is unfavourable for vibration excitation, while unloading towards the tip can effectively reduce both the fluctuating pressure and the noise levels.

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ORCID

Cheng Yu http://orcid.org/0000-0002-4495-8793

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Experimental investigation of the effects of blade geometry on pressure fluctuation and noise of tunnel thrusters

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