基于壁面模化大涡模拟的SUBOFF壁面脉动压力特性分析  

Wall-modeled Large Eddy Simulation for Wall-pressure Fluctuations around SUBOFF

作　　者：和康健 潘治[2] 赵伟文 万德成[1] HE Kangjian;PAN Zhi;ZHAO Weiwen;WAN Decheng(Computational Marine Hydrodynamic Lab(CMHL),School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Wuhan Second Ship Design and Research Institute,Wuhan 430205,China)

机构地区：[1]上海交通大学船海计算水动力学研究中心(CMHL)船舶海洋与建筑工程学院,上海200240 [2]武汉第二船舶设计研究所,武汉430205

出　　处：《中国造船》2024年第2期189-197,共9页Shipbuilding of China

基　　金：国家自然科学基金项目(52131102)。

摘　　要：采用壁面模化大涡模拟方法,通过近壁面边界层内层流动的壁面应力模型模化处理以及边界层外层和远场流动直接数值求解,对均匀来流中的SUBOFF潜艇主体模型周围的流动进行数值模拟。分析模型平行中体监测点处的壁面脉动压力特性,获得壁面脉动压力的自功率谱密度曲线。平行中体区域的湍流边界层发展较为充分,不同测点处的脉动压力自功率谱密度变化基本相同,随频率增加而逐渐降低。Wall-modeled large eddy simulation is used to study wall-pressure fluctuations in turbulent boundary layer around an axisymmetric body of SUBOFF.Large eddy simulation is applied to solve the flow in the outer region and outside the boundary layer,while the inner-layer flow is modeled with wall-stress model.Numerical results of time-averaged pressure and skin-friction coefficients are agreed well with the experimental data.Spectrum analysis is adopted to get the self-power spectral of wall-pressure fluctuations.The characteristics of self-power spectrum of wall pressure fluctuations in different positions on the mid-body are analyzed and discussed.The self-power spectrum of wall pressure fluctuations deceases as the frequency increases.Because the turbulent flow is fully developed on the mid-body,the self-power spectrums of wall pressure fluctuations at different positions are similar.

关 键 词：湍流边界层 壁面脉动压力 壁面模化大涡模拟 SUBOFF 

分 类 号：U661.1[交通运输工程—船舶及航道工程]