利用CFD计算水下航行器直航附加质量的方法研究

A METHOD OF CALCULATING THE ADDED MASS OF UNDERWATER VEHICLE IN DIRECT FLIGHT BY CFD

郑志航 ¹张丽芳 ¹何波 ²严天宏¹

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作者信息

1. 中国计量大学机电工程学院浙江杭州 310016
2. 中国海洋大学信息科学与工程学院山东青岛 266100
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摘要

水下自主航行器(Autonomous Underwater Vehicle,AUV)是一种高度非标准化设备,理论计算不能准确地求取外形不一的AUV直航方向的附加质量.提出一种基于商业软件ANSYS FLUENT的计算流体动力学(Computational Fluid Dynamics,CFD)求解方法,与传统的基于动网格的CFD方法不同,该方法不需要使用动网格,在保证计算精度的同时降低了网格要求且极大地提升了计算速度.为验证本方法的准确性,对标准椭圆球分别进行CFD仿真及理论计算.该方法得到的附加质量值与理论计算值偏差小于3％.说明在设计初期,用该方法计算任意外形的AUV直航方向的附加质量结果可靠.

Abstract

AUV is a highly nonstandard equipment,and the theoretical calculation can not accurately calculate the added mass of AU Vs with different shapes in direct direction.In this paper,a CFD method based on commercial software ANSYS fluent is proposed,which is different from the traditional CFD method based on dynamic grid.This method does not need to use dynamic grid,which reduces the grid requirements and greatly improves the calculation speed while ensuring the calculation accuracy.In order to verify the accuracy of this method,CFD simulation and theoretical calculation of standard ellipsoid were carried out respectively.The deviation between the added mass value obtained by this method and the theoretical value is less than 3％.At the beginning of the design,the method can be used to calculate the added mass of AUV with arbitrary shape in direct direction,and the result is reliable.

关键词

AUV/CFD/椭圆球/匀加速直线运动/附加质量

Key words

AUV/CFD/Ellipsoid/Uniformly accelerated linear motion/Added mass

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基金项目

国家重点研发计划项目(2016YFC0301404)

国家自然科学基金项目(51379198)

出版年

2024

计算机应用与软件

上海市计算技术研究所上海计算机软件技术开发中心

计算机应用与软件

CSTPCD北大核心

影响因子：0.615

ISSN：1000-386X

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