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Volume 12, Issue 24 (1-2017)                   Marine Engineering 2017, 12(24): 1-11 | Back to browse issues page

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Dehghan Manshadi M, Hejranfar K, Farajollahi A H. Numerical and Experimental Investigation of Hydrodynamic Behavior of a Horseshoe Vortex around sail. Marine Engineering 2017; 12 (24) :1-11
URL: http://marine-eng.ir/article-1-473-en.html
1- Mech. Eng., Malek Ashtar University of Technology
2- Aero. Eng., Sharif University of Technology
3- Aero. Eng., Malek Ashtar University of Technology
Abstract:   (5774 Views)

The horseshoe vortex generated around the sail-body junction of a submarine has an important influence on the uniformity of the submarine wake at the propeller and hydrodynamic noise. The influence of the horseshoe vorex on the submarine performance is not negligible. A suitable way to reduce the effects of this separated flow is to use vortex generators. The main goal of the present study is to investigate the flow field around a standard underwater model employing the vortex generator by using the oil flow visualization method and CFD method (OpenFOAM code) in 0°≤α≤30° angles of attack. In this study, the application of experimental method in wind tunnel and CFD simulation which can help us to precisely study the structure of vortical flow field. The results show that Vortex Generators placed along the submarine do indeed significantly reduce strength of the horseshoe vortex, line separation, size of cross-flow vortices and drag force.

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Type of Study: Research Paper | Subject: Submarine Hydrodynamic & Design
Received: 2016/02/15 | Accepted: 2016/11/27

References
1. Juan, S., Fidler, J.E. and Smith, C.A., (1978), Methods for Prediction Submersible Hydrodynamic Characteristics
2. Bushnellt, D.M., and Donaldson, C.D., (1990), “Control of Submresible Vortex Flows” NASA Technical Memorandum no. 102693.
3. Zhi-hua, L., Ying, X., Zhan-zhi, W., Song, W., (2010), Numerical Simulation and Experimental Study of the New Method of Horseshoe Vortex Control, 2010, 22(4):572-581, DOI: 10.1016/s1001-6058(09)60090-1.
4. Taylor, H.D., (1947), The Elimination of Diffuser Separation by Vortex Generators, United Aircraft Corporation, Report No. R-4012-3.
5. Pearcey, H.H., (1961), Shock-Induced Separation and its Prevention by Design and Boundary Layer Control. Boundary Layer and Flow Control, Its Principal and Applications, Vol. 2, edited by G.V. Lachman, Pergamon Press, Oxford, England, pp. 1166-1344.
6. Wetzel, T.G., and Simpson, R.L., (1992(a)) The Effect of Vortex Generators on Crossflow Separation on a Submarine in a Turning Maneuver, Report VPI-AOE- 186, distributed by DTIC for Defense Advanced Research Projects Agency.
7. Barlow, J. B., Rae, W.H., and Pope, A., (1999), Low-Speed Wind Tunnel Testing, Third Ed., John Wiley and Sons, pp. 627-630.
8. Saeidi Nezhad, A., Dehghan, A.A., Dehghan Manshadi, M., and Kazemi Esfeh, M., (2012), Experimental Investigtion of the Vortex Structure on a Submmersible Model, Modares Mechanical Engineering, Vol. 13, pp. 98-109.(In Persian)
9. Dehghan Manshadi, M., Hejranfar, k., and Farajollahi, A.H., (2015), Numerical and Experimental Investigation of Effect of Vortex Generators on Flow over Suboff Bare Hull Model, Modares Mechanical Engineering, Vol. 9, pp. 1-11.(In Persian)
10. Alin, N., Bensow, R.E., Fureby, C., Huuva, T., and Svennberg, U., (2010), Current Capabilities of DES and LES for Submarines at Straight Course, Journal of Ship Research, vol.54, No. 3, pp. 184-196.
11. Sakthive, R., Vengadesan, S., and Bhattacharyya, S.K., (2011), Application of Non-Linear κ-ε Turbulene Model in Flow Simulation over Uuderwater Axisymmetric Hull at Higher Angle of Attack, Journal of Naval Architecture and Marine Engineering, December, DOI: 10.3329/jname.v8i2.6984.
12. The open source CFD toolbox, OpenFOAM, [Online] http://www.openfoam.com.
13. Groves, N.C., Huang, T.T., and Chang, M.S., (1989), Geometric Characteristics of DARPA SUBOFF Models (DTRC Model Nos. 5470 And 5471), Report DTRC/SHD-1298-01, March.
14. Huang, T., Liu, H.L., Groves, N., Forlini, T., Blanton, J., and Gowing, S., (1992), Measurements of Flows Over an Axisymmetric Body with Various Appendages in a Wind Tunnel: the DARPA SUBOFF Experimental Program, Nineteenth Symposium on Naval Hydrodynamics. Seoul, Korea.
15. Roddy, R.F., (1990), Investigation of the Stability and Control Characteristics of Several Configurations of the DARPA Suboff Model (DTRC model 5470) from captive-model experiments, David Taylor Research Center, Ship Hydromechanics Department, DTRC/SHD-1298-08, September.
16. Pantelatos, D.K., and Mathioulakis, D.S., (2004), Experimental Flow Study over a Blunt-Nosed Axisymmetric Body at Incidence, Journal of Fluids and Structures, Vol. 19, pp. 1103-1115.
17. Kazemi Esfeh., M., Dehghan, A.A., and Dehghan Manshadi, M., (2012), Experimental Investigtion of Upstream Structures Influence on the Ventilation Performance of One-Sided Wind-Catchers, Modares Mechanical Engineering,, Vol. 13, pp. 49-60.(In Persian).
18. Liu, H.L., and Huang, T.T., (1998), Summary of DARPA Suboff Experimental Program Data, Naval Surface Warfare Center Carderock Division (NSWCCD), West Bethesda, MD, report CRDKNSWC/HD-1298-11.
19. Yang, C., and Lohner, R., (2003), Prediction of Flows over an Axisymmetric Body with Appendages, The 8th International Conference on Numerical Ship Hydrodynamics, September 22-25, 2003, Busan, Korea.
20. Vaz, G., Toxopeus, S., and Holmes, S., (2010), Calculation of Manoeuvring Forces on Submrines Using Two Viscous-Flow Solvers, Proceedings of the ASME 2010, 29th International Conference on Ocean, Offshore and Arctic Engineering OMAE2010, June 6-11, Shanghai, China.
21. Jimenez, M. Hultmark, M. and Smits, A.J., (2010), The Intermediate Wake of a Body of Revolution at High Reynolds Numbers, Journal of Fluid Mechanics, Vol. 659, pp. 516-539.

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