水下航行体表面水动力激励力预测模型  

Forecasting model for hydrodynamic force induced by flow on underwater vehicle

作　　者：吕世金[1] 高岩[1] 刘进[1] 沈琪[1] LYU Shi-jin;GAO Yan;LIU Jin;SHENG Qi(China Ship Science Research Center,Nation Key Laboratory on Ship Vibration and Noise,Wuxi 214082,China)

机构地区：[1]中国船舶科学研究中心船舶振动噪声重点试验室,江苏无锡214082

出　　处：《水动力学研究与进展（A辑）》2020年第6期705-710,共6页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金(91952301)。

摘　　要：水动力激励力由航行体壁面湍流脉动压力引起,是航行体水动力噪声预报的输入力源。该文利用回转体模型表面脉动压力风洞测试结果,参考流动激励力与边界层参数的经典关系,给出水下结构流激壁面湍流脉动压力归一化数学模型,经平板及回转体模型水洞实验考核,20 Hz以上频段,预测结果与实验结果有很好的一致性,偏差小于3 dB,为水下航行体水动力噪声定量评估提供激励力输入参数。Hydrodynamic force induced by turbulent boundary layer is the important input parameter in forecasting hydrodynamic noise of underwater vehicles. An unitary mathematics model of turbulent wall fluctuant pressure on underwater bodies is established in this paper based on testing results of revolution body model in wind tunnel, while considering the relationship between hydrodynamic force and boundary layer parameter. The predicted fluctuant pressure on model wall agrees well with that of plate and revolution body model tested in water tunnel,the deviation of fluctuant pressure level is less than 3 d B in frequency range over 20 Hz. This forecasting model can give the input parameter for hydrodynamic noise simulation of an underwater vehicle.

关 键 词：水下航行体 水动力 激励力 预测 

分 类 号：O357.5[理学—流体力学]