华中科技大学学报（自然科学版）2017，Vol.45Issue(11)：87-91,102,6.DOI:10.13245/j.hust.171116
基于流固耦合的弹性水翼流致噪声数值分析
Numerical study on flow induced noise of flexible hydrofoil based on fluid structure interaction
摘要
Abstract
As flexible hydrofoil deforms too much under fluid impact ,the hydrodynamic load was cal-culated by computational fluid dynamics (CFD) method and structural response was calculated by fi-nite element method .A two-way fluid structure interaction numerical method was established .The steady flow field and pressure fluctuation of NACA 66mod hydrofoil were obtained with the method under structural deformation ,and numerical results illustrate that transition happens to the hydrofoil at attack angle of 4°~6° and Reynolds number of 7.5 × 105 .Based on the fluctuation pressure ,a flow induced noise calculation method was established with mode superposition method and acoustical boundary element method .Numerical calculation results show that main frequency peak of the flow in-duced noise reduces after transition ;the main frequency and sound pressure level of the two compo-nents increase by 25 Hz and 3 dB with Reynolds number increasing by 1.5 × 105 ,respectively ;flow noise depends on pressure fluctuation while vibration noise depends on structural natural characteris-tics as well as excitation force ;for overall sound pressure level (SPL) ,the flow noise of hydrofoil is greater than its own vibration noise ;vibration noise damps faster near the wall while flow noise damps faster in far field .关键词
弹性水翼/流固耦合/转捩/流噪声/振动噪声Key words
flexible hydrofoil/fluid structure interaction/transition/flow noise/vibration noise分类
交通工程引用本文复制引用
徐野,熊鹰,黄政..基于流固耦合的弹性水翼流致噪声数值分析[J].华中科技大学学报（自然科学版）,2017,45(11):87-91,102,6.基金项目
国家自然科学基金资助项目(51579243). （51579243）
