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Numerical simulation on the effect of fairwater optimization to suppress the wall pressure fluctuations and flow induced noise
Author(s): 
Pages: 448-458
Year: Issue:  4
Journal: Journal of Ship Mechanics

Keyword:  fairwatershape optimizationhorse-shoe vortexpressure fluctuationsflow induced noiselarge eddy simulation (LES)acoustic analogy;
Abstract: Numerical simulation of wall pressure fluctuations and flow induced noise of submarine has be-come vigorous in the field of flow-acoustic coupling. The fairwater of a submarine is optimized by two shapes, one is the fairwater with fillet, and another is three-dimensional canopy-like fairwater. Numerical investigation by LES and acoustic analogy is carried out to analyze the vortical flow fields (horse-shoe vor-tex) and acoustic characteristics of the three fairwaters, and the effect of optimization is studied to describe the quantitative change of pressure fluctuations and flow induced noise. This study shows that the optimiza-tion of fairwater is able to improve the flow quality around fairwater especially in the junction of fairwater and hull, and the wall pressure fluctuations and flow induced noise can be suppressed obviously. The work is beneficial to the research in the field of flow-acoustic coupling and the design of the submarine with a new type.
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