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Citation:
　Saeed Abedi,Ali Akbar Dehghan,Ali Saeidinezhad,et al.Effects of Bulbous Bow on Cross-Flow Vortex Structures Around a Streamlined Submersible Body at Intermediate Pitch Maneuver:A Numerical Investigation[J].Journal of Marine Science and Application,2016,(1):8-15.[doi:10.1007/s11804-016-1338-x]
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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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Title:
Effects of Bulbous Bow on Cross-Flow Vortex Structures Around a Streamlined Submersible Body at Intermediate Pitch Maneuver:A Numerical Investigation
Author(s):
Saeed Abedi1;  Ali Akbar Dehghan1;  Ali Saeidinezhad1;  Mojtaba Dehghan Manshadi2
Affilations:
Author(s):
Saeed Abedi1;  Ali Akbar Dehghan1;  Ali Saeidinezhad1;  Mojtaba Dehghan Manshadi2
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
Keywords:
submarine; intermediate angle; cross-flow separation; vortex structures; computational fluid dynamics(CFD); wind tunnel experiment
分类号:
-
DOI:
10.1007/s11804-016-1338-x
Abstract:
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.

References:

Clarke D, Brandner P, Walker G, 2008. Experimental and computational investigation of the flow around a 3-1 prolate spheroid. WSEAS Trans Fluid Mech, 3, 207-217.
DOI:10.1.1.522.1080
Constantinescu GS, Pasinato H, Wang YQ, Forsythe JR, Squires KD, 2002. Numerical investigation of flow past a prolate spheroid. Journal of Fluids Engineering, 124(4), 904-910.
DOI:10.1115/1.1517571
De Barros E, Dantas JL, Pascoal AM, De Sá E, 2008. Investigation of normal force and moment coefficients for an AUV at nonlinear angle of attack and sideslip range. IEEE Journal of Oceanic Engineering, 33(4), 538-549.
DOI:10.1109/JOE.2008.2004761
Ericsson L, Reding J, 1986. Asymmetric vortex shedding from bodies of revolution. Tactical Missile Aerodynamics, 104, 243-296.
Groves NC, Huang TT, Chang MS, 1989. Geometric characteristics of DARPA suboff models:(DTRC Model Nos. 5470 and 5471). David Taylor Research Center.
Mackay M, 2003. The standard submarine model:a survey of static hydrodynamic experiments and semiempirical predictions.Defence R&D Canada-Atlantic.
Menter FR, 1994. Two-equation eddy-viscosity turbulence models for engineering applications. AIAA Journal, 32(8), 1598-1605.
DOI:10.2514/3.12149
Pope SB, 2000. Turbulent flows. Cambridge University Press.
Rhie C, Chow W, 1983. Numerical study of the turbulent flow past an airfoil with trailing edge separation. AIAA Journal, 21(11), 1525-1532.
DOI:10.2514/3.8284
Saeidinezhad A, Dehghan AA, Dehghan Manshadi M, 2015. Nose shape effect on the visualized flow field around an axisymmetric body of revolution at incidence. Journal of Visualization, 18(1), 83-93.
DOI:10.1007/s12650-014-0226-1
Sreenivas K, Hyams D, Mitchell B, Taylor L, Briley W, 2003.Physics based simulation of reynolds number effects in vortex intensive incompressible flows. DTIC Document.
Timothy B, Dennis J, 1989. The design and application of upwind schemes on unstructured meshes. 27th Aerospace Sciences Meeting, Reno, USA, 89-366.
Vaz G, Toxopeus S, Holmes S, 2010. Calculation of manoeuvring forces on submarines using two viscous-flow solvers. ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering, Shanghai, China, 621-633.
Wu BS, Xing F, Kuang XF, Miao QM, 2005. Investigation of hydrodynamic characteristics of submarine moving close to the sea bottom with CFD methods. Journal of Ship Mechanics, 9(3), 19-28.
Wilcox DC, 1998. Turbulence Modeling for CFD. DCW Industries.

Memo

Memo:
Received date: 2015-07-12;Accepted date: 2015-10-26。
Corresponding author: Ali Saeidinezhad, E-mail:a.saeidinezhad@gmail.com
Last Update: 2016-07-06