Computational Fluid Dynamics and Experimental Hydrodynamic Analysis of a Solar AUV

Ehsan Asadi Asrami; Mohammad Moonesun; Farhad Azizi Abi

doi:10.24423/cames.301

Ehsan Asadi Asrami Takestan Islamic Azad University
Mohammad Moonesun Malek-e-Ashtar University of Technology
Farhad Azizi Abi Sharif University of Technology

DOI: http://dx.doi.org/10.24423/cames.301

Abstract

In the present study, the effect of free surface on the hydrodynamic forces acting on the motion of an autonomous underwater vehicle (AUV) has been investigated. The AUV is powered by solar energy. Using computational fluid dynamics, the Reynolds averaged Navier Stokes (RANS) equations for the flow around the AUV are solved, and the free surface effect is simulated using the volume of fluid (VOF) two-phase flow model. For this purpose, the commercial code ANSYS FLUENT 18 was used. The results of the numerical solution are compared with experimental results of the AUV model in the surface motion in the towing tank of the Persian Gulf National Laboratory with a scale of 1:1. The experiment was performed in a fixed draft and the velocity was ranging from 0.2 m/s to 1.4 m/s (according to Reynolds number 2.4 x 10⁵ to 1.7 x 10⁶).

Keywords

solar AUV, free surface, CFD, towing tank,

References

1. ANSYS CFX Release 12.1, ANSYS, Inc., Canonsburg, PA, USA, 2009.
2. De Marco A., Mancini S., Miranda S., Scognamiglio R., Vitiello L., Experimental and numerical hydrodynamic analysis of a stepped planing hull, Applied Ocean Research, 64: 135–154, 2017.
3. Javadi M., Dehghan Manshadi M., Kheradmand S., Moonesun M., Experimental investigation of the effect of bow profiles on resistance of an underwater vehicle in free surface motion, Journal of Marine Science and Application, 14(01): 53–60, 2015.
4. Rhee K., Choi J., Lee S., Mathematical model of wave forces for the depth control of a submerged body near the free surface, The Eighteenth International Offshore and Polar Engineering Conference, 6–11 July, Vancouver, Canada, 2008.
5. Mansoorzadeh Sh., Javanmard E., An investigation of free surface effects on drag and lift coefficients of an autonomous underwater vehicle (AUV) using computational and experimental fluid dynamics methods, Journal of Fluids and Structures, 51: 161–171, 2014.
6. Moonesun M., Ghasemzadeh F., Korol Y., Nikrasov V., Yastreba A., Ursolov A., Mahdian A., Technical notes on the near surface experiments of submerged submarine, International Journal of Maritime Technology, 5: 41–54, 2016.
7. Dalayeli H., Javadi M., Mousavizadegan S.H., Gharachahi A., Moonesun M., Ursalov A., Wave profile and deck wetness of submarine at surface condition, International Journal of Recent Advances in Multidisciplinary Research, 2(12): 1083–1091, 2015.
8. Moonesun M., Korol Y.M., Moosavizadegan S.H., Dalayeli H., Mahdian A., Javadi M., Brazhko A., Wave making system in submarines at surface condition, Indian Journal of Geo Marine Sciences, 45(1): 44–53, 2016.
9. Moonesun M., Ghasemzadeh F., Korol Y., Valeri M., Yastreba A., Ursalov A., Effective depth of regular wave on submerged submarines and AUVs, International Robotics & Automation Journal, 2(6): 208–216, 2017.
10. Nematollahi A., Dadvand A., Dawoodian M., An axisymmetric underwater vehicle-free surface interaction: A numerical study, Ocean Engineering, 96: 205–214, 2015.
11. Razgallah I., Kaidi S., Smaoui H., Sergent Ph., The impact of free surface modelling on hydrodynamic forces for ship navigating in inland waterways: water depth, drift angle, and ship speed effect, Journal of Marine Science and Technology, 24: 620–641, 2019.
12. Salari M., Rava A., Numerical investigation of hydrodynamic flow over an AUV moving in the water-surface vicinity considering the laminar-turbulent transition, Journal of Marine Science and Application, 16: 298–304, 2017.
13. Shariati S.K., Mousavizadegan S.H., The effect of appendages on the hydrodynamic characteristics of an underwater vehicle near the free surface, Applied Ocean Research, 67: 31–43, 2017.
14. Steenson L.V., Phillips A.B., Furlong M.E., Rogers E., Turnock S.R., The performance of vertical tunnel thrusters on an autonomous underwater vehicle operating near the free surface in waves, Second International Symposium on Marine Propulsors SMP’11, Hamburg, Germany, June 2011.