Numerical investigations into the influence of geometric configurations on hydrodynamic characteristics of torpedo anchors |
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| Institution: | 1. Department of Ocean Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China;2. Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 511458, China;3. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong;1. School of Civil Engineering, Hunan University of Technology, Zhuzhou, Hunan, 412007, China;2. Key Laboratory of Safety Control of Bridge Engineering, Ministry of Education (Changsha University of Science and Technology), Changsha, Hunan, 410114, China;3. China Institute of Water Resources and Hydropower Research, Beijing, 100038, China;1. National Centre for Maritime Engineering and Hydrodynamics, Australian Maritime College, University of Tasmania, Launceston, Tasmania, Australia;2. NavTec Pty Ltd, Perth, Western Australia, Australia;1. School of Civil Engineering, Sun Yat-Sen University, Guangzhou, China;2. Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China;3. Architectural Design and Research Institute, South China University of Technology, Guangzhou, China;4. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China;1. College of Civil Engineering, Hunan University, Changsha, Hunan, 410082, China;2. School of Marine Science and Engieering, State Key Laboratory of Subtropical Building Science, South China Institute of Geotechnical Engineering, South China University of Technology, 381 Wushan Rd, Guangzhou, 510640, China;3. School of Civil and Mechanical Engineering, Curtin University, Kent Street, Bentley, 6102, Australia |
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| Abstract: | Torpedo anchors are an innovative and cost-effective technology in marine foundation engineering; however, there is a lack of systematic and comprehensive studies on the influence of torpedo anchor geometry on its hydrodynamic characteristics, especially the effect of anchor fin configuration on the hydrodynamic characteristics is rarely reported in the existing literature. Therefore, this study investigates the influence of geometric characteristics of both finless and finned torpedo anchors on their terminal velocity, drag coefficient and installation directional stability in water through CFD numerical analysis in a systematical manner. The considered geometric characteristics include the center of gravity position, shape and angle of anchor tip, shaft and fin aspect ratio, fin number, fin thickness, fin shape, fin position and fin area. Based on the obtained numerical results, some practical design recommendations and impact weighting charts of different anchor geometric factors are provided, which enables a quick qualitative and quantitative assessment of torpedo anchors. In addition, a simple weight-based approach for estimation of terminal velocity and drag coefficient of torpedo anchors considering multiple geometric configuration factors is proposed, which may provide some reference and scientific guidance for experimental and engineering design of torpedo anchors. |
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| Keywords: | Torpedo anchor Hydrodynamic characteristics Directional stability Geometric configurations CFD analysis Weight-based design method |
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