Numerical investigation of the tunnel aperture on drag reduction in a high-speed tunneled planing hull

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• 作者：Hamid Kazemi Moghadam ; Rouzbeh Shafaghat…
• 关键词：High ; speed planing hull ; Tunnel aperture ; Dynamic mesh ; Drag reduction ; Volume of fluid (VOF) ; Fluent
• 刊名：Journal of the Brazilian Society of Mechanical Sciences and Engineering
• 出版年：2015
• 出版时间：November 2015
• 年：2015
• 卷：37
• 期：6
• 页码：1719-1730
• 全文大小：3,197 KB
• 参考文献：1.Ma W, Sun H, Zou J, Yang H (2013) Test research on the resistance performance of high-speed trimaran planing hull, Polish maritime Research, No 4/2013
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• 作者单位：Hamid Kazemi Moghadam (1)
  Rouzbeh Shafaghat (1)
  Reza Yousefi (1)
  
  1. Babol Noshirvani University of Technology, Babol, Iran
  
• 刊物主题：Mechanical Engineering;
• 出版者：Springer Berlin Heidelberg
• ISSN：1806-3691

文摘

One of the methods for reducing drag is inducing a change in the shape of the body due to making longitudinal side tunnels on the hull body. In this method, the usual shape of a specific mono-hull is changed into tunneled one keeping the geometric parameters, including deadrise angle, keel line, beam width, and the hull length, constant. Various geometric parameters are effective on drag reduction of different sections of the tunnel while designing and manufacturing the hull. To obtain an optimum shape for the tunnel, this study has attempted the influence of the size of the tunnel aperture on hydrodynamic parameters of the hull. For this purpose and through considering the moving mesh, numerical simulation of the problem by means of finite volume method has been employed, using FLUENT commercial software. For turbulence modeling, k-ε model, and for simulating the free surface, the volume of fluid two phase model has been used. In addition, remeshing and smoothing methods were employed for moving mesh. The presented results show that, forming a tunnel in the base hull could cause a reduction in the total drag in high-speed planing hulls and in the vessel draft over the whole range. Furthermore, in high Froude number, a reduction in the size of the tunnel aperture (up to a specific amount) could lead to a decrease in the total drag. Keywords High-speed planing hull Tunnel aperture Dynamic mesh Drag reduction Volume of fluid (VOF) Fluent