基于本征正交分解法的深潜器下潜姿态水动力特性研究  

Study on hydrodynamic characteristics of submersible diving attitude basedon the proper orthogonal decomposition method

作　　者：黄佳鑫 王杉 晏飞[1] HUANG Jiaxin;WANG Shan;YAN Fei(School of Mechanical Engineering,Jiangsu University of Science and Technology,Zhenjiang 212100,China)

机构地区：[1]江苏科技大学机械工程学院,镇江212100

出　　处：《江苏科技大学学报(自然科学版)》2025年第2期1-7,共7页Journal of Jiangsu University of Science and Technology:Natural Science Edition

基　　金：江苏省自然科学基金项目(BK20191459)。

摘　　要：为了研究深海载人潜水器在不同下潜姿态下的水动力特性,对“蛟龙”号深潜器1∶36缩比简化模型进行了水动力试验.通过六分量传感器得到不同下潜姿态下深潜器的阻力、升力和俯仰力矩,利用粒子图像测速法(particle image velocimetry,PIV)拍摄深潜器尾流流场,获得时均流场分布,并利用本征正交分解法(proper orthogonal decomposition,POD)提取流场主要模态,结合傅里叶变换获得模态时间能量功率谱,从而分析深潜器受力变化的流场原因.结果表明:相比于垂直下潜姿态,以30°纵倾角下潜时阻力下降了9.3%,升力下降了77.3%,俯仰力矩下降了7.7%,艉部尾流区漩涡消失,最大湍动能下降了6.3%;随着下潜纵倾角增加,POD一阶模态的时间能量变化频率先增后减,在10°下潜纵倾角下,流场变化最为激烈.In order to study the hydrodynamic characteristics of the manned deep-sea submersible in different diving attitudes,we carry out hydrodynamic tests on the simplified model of"Jiaolong"submersible scalled down by 1∶36.The drag force,lift force and pitching moment of the submersible in different diving attitudes are obtained by six-component sensors,the time-averaged flow field distribution is obtained by photographing the flow field in the wake of the submersible using PIV particle image velocimetry,the main modes of the flow field are extracted by using the POD technique,and the modal time energy power spectra are obtained by application of the Fourier transform,so as to analyze the reasons of the flow field for the changes in the force applied to the submersible.The results show that compared with the vertical dive attitude,the drag force decreases by 9.3%,the lift force decreases by 77.3%,the pitching moment decreases by 7.7%,the vortex in the stern wake area disappears,and the maximum turbulent kinetic energy decreases by 6.3%when diving at 30°rake angle;with the increase of the dive longitudinal angle,the frequency of time-energy change of the first-order modes of the POD firstly increases and then decreases,and the flow field undergoes the most drastic changes at 10°downdip longitudinal inclination.

关 键 词：载人潜水器 下潜姿态 本征正交分解 傅里叶变换 水动力试验 

分 类 号：U674.941[交通运输工程—船舶及航道工程] TV139.2[交通运输工程—船舶与海洋工程]