Effects of bulbous bow on cross-flow vortex structures around a streamlined submersible body at intermediate pitch maneuver: A numerical investigation

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• 作者：Saeed Abedi ; Ali Akbar Dehghan…
• 关键词：submarine ; intermediate angle ; cross ; flow separation ; vortex structures ; computational fluid dynamics (CFD) ; wind tunnel experiment
• 刊名：Journal of Marine Science and Application
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：15
• 期：1
• 页码：8-15
• 全文大小：845 KB
• 参考文献：ANSYS, 2011. ANSYS CFX Release 14.0.
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• 作者单位：Saeed Abedi (1)
  Ali Akbar Dehghan (1)
  Ali Saeidinezhad (1)
  Mojtaba Dehghan Manshadi (2)
  
  1. Department of Mechanical Engineering, Yazd University, Yazd, 89195-741, Iran
  2. Department of Mechanical and Aerospace Engineering, Malek Ashtar University of Technology, Esfahan, 83145-115, Iran
  
• 刊物类别：Engineering
• 刊物主题：Offshore Engineering
  Machinery and Machine Elements
  Electrical Power Generation and Transmission
  Chinese Library of Science
  
• 出版者：Harbin Engineering University
• ISSN：1993-5048

文摘

A flow field around a streamlined body at an intermediate angle of incidence is dominated by cross-flow separation and vortical flow fields. The separated flow leads to a pair of vortices on the leeside of the body; therefore, it is essential to accurately determine this pair and estimate its size and location. This study utilizes the element-based finite volume method based on RANS equations to compute a 3D axisymmetric flow around a SUBOFF bare submarined hull. Cross-flow vortex structures are then numerically simulated and compared for a submarine with SUBOFF and DRDC STR bows. Computed results of pressure and shear stress distribution on the hull surface and the strength and locations of the vortex structures are presented at an intermediate incidence angle of 20°. A wind tunnel experiment is also conducted to experimentally visualize the vortex structures and measure their core locations. These experimental results are compared with the numerical data, and a good agreement is found.