朱锡清,李亚,孙红星.船舶螺旋桨叶片与艉部湍流场互作用噪声的预报研究[J].声学技术,2006,(4):361~364 |
船舶螺旋桨叶片与艉部湍流场互作用噪声的预报研究 |
Prediction of noise induced by interaction between turbulent flow and propeller blades |
投稿时间:2005-02-28 修订日期:2005-05-12 |
DOI: |
中文关键词: 螺旋桨 湍流 低频宽带噪声 |
英文关键词: propeller turbulent flow low-frequency broadband noise |
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中文摘要: |
低噪声特性是螺旋桨设计者所追求的目标之一。当船尾的螺旋桨周期性旋转在空间和瞬时随机的非均匀流场中时,在螺旋桨叶片上就会产生升力脉动,从而辐射出离散谱噪声和低频宽带噪声。利用湍流谱和Ffowcs Williams-Hawkings方程可以获得低频宽带噪声级。这种方法可用于实船螺旋桨噪声预报和低噪声设计,这对提高舰船安静化程度有重要的现实意义。 |
英文摘要: |
An important feature to be sought in propeller design is low noise.When the propeller rotates periodically in a non-uniform flow field,which varies irregularly with space and time,discrete and broadband non-cavitation noise is radiated due to the lift pulsation occurred on the blade surface.A method is developed for prediction of low-frequency broadband propeller noise based on combination of the spectrum of turbulent flow and the Ffowcs Williams-Hawkings equations.Examples show validity and practicality of the method. |
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