Numerical Simulation and Analysis of Added Mass for the Underwater Variable Speed Motion of Small Objects

文献类型: 外文期刊

第一作者: Wang, Xuanquan

作者: Wang, Xuanquan;Wang, Xuanquan;Xiao, Suwei;Wang, Xinchun;Qi, Debo

作者机构: Beijing Inst Technol, Sch Opt & Photon, Beijing 100081, Peoples R China;Beijing Inst Technol, Yangtze Delta Reg Acad, Jiaxing 314003, Peoples R China;Chinese Acad Trop Agr Sci, Rubber Res Inst, Haikou 570216, Peoples R China;Beijing Aerosp Automat Control Inst, Beijing 100854, Peoples R China;Yangzhou Polytech Inst, Coll Intelligent Mfg, Yangzhou 225127, Peoples R China

关键词: added mass; added mass force; pressure drag; viscous drag; computational fluid mechanics

期刊名称:JOURNAL OF MARINE SCIENCE AND ENGINEERING ( 2022影响因子:2.9; 五年影响因子:2.9 )

ISSN:

年卷期: 2024 年 12 卷 4 期

页码:

收录情况: SCI

摘要: Unlike uniform motion, when an object moves underwater with variable speed, it experiences additional resistance from the water, commonly referred to as added mass force. At present, several methods exist to solve this force, including theoretical, experimental, and simulation approaches. This paper addresses the challenge of determining the added mass force for irregularly shaped small objects undergoing variable speed motion underwater, proposing a method to obtain the added mass force through numerical simulation. It employs regression analysis and parameter separation analysis to solve the added mass force, added mass, viscous drag coefficient, and pressure drag coefficient. The results indicate that an added mass force exists during both the acceleration and deceleration of the object, with little difference between them. Under the same velocity conditions, significant differences exist in pressure drag forces, while differences in viscous drag forces are not significant. This suggests that the primary source of added mass force is pressure drag, with viscous drag having little effect on it. During acceleration, the surrounding fluid accelerates with the object, increasing the pressure drag with a high-pressure area concentrating at the object's front, forming an added mass force that is directed backward. By contrast, during deceleration, the fluid at the object's front tends to detach, and the fluid at the rear rushes forward, leading to a smaller high-pressure area at the front and a larger one at the rear, reducing the pressure drag and forming an added mass force that is directed forward. By comparing the added mass of a standard ellipsoid obtained from numerical simulation with theoretical values, the regression analysis method is proven to be highly accurate and entirely applicable for solving the added mass of underwater vehicles.

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