Numerical investigation of the effects of magnetic field and fluid electrical conductivity on the performance of marine magnetohydrodynamic motors

Numerical investigation of the effects of magnetic field and fluid electrical conductivity on the performance of marine magnetohydrodynamic motors

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A magnetohydrodynamic (MHD) thruster is a type of electric motors which does not have mechanical moving parts and directly converts electrical energy into mechanical energy. In this study, the effect of magnetic field intensity and seawater electrical conductivity on the performance of a marine MHD thruster model is investigated using fully three-dimensional numerical simulations. For the first time, all electric, magnetic and fluid flow fields are considered in three dimensions. The effects of seawater electrolysis and end loss are taken into account in all simulations and a simple analytical model is developed to verify the numerical results. It is shown that increasing the magnetic field intensity or the electrical conductivity of the working fluid decreases the electrochemical and ohmic losses of the thruster at a specific velocity. Therefore, a higher efficiency can be achieved at higher magnetic field strengths and higher seawater electrical conductivities. Also, it is revealed the end loss of the channel increases with an increase in the electrical conductivity of the working fluid and decreases with an increase in the magnetic field intensity.


    1. 1)
      • 1. Tawk, M., Avenas, Y., Kedous-Lebouc, A., et al: ‘Numerical and experimental investigations of the thermal management of power electronics with liquid metal mini-channel coolers’, IEEE Trans. Ind. Appl., 2013, 49, (3), pp. 14211429.
    2. 2)
      • 2. Hardianto, T., Sakamoto, N., Harada, N.: ‘Three-dimensional flow analysis in a Faraday-type MHD generator’, IEEE Trans. Ind. Appl., 2008, 44, (4), pp. 11161123.
    3. 3)
      • 3. Tanaka, M., Okuno, Y.: ‘Performance of a seed-free disk magnetohydrodynamic generator with self-excited joule heating in the nozzle’, IEEE Trans. Plasma Sci., 2017, 45, (3), pp. 454460.
    4. 4)
      • 4. Haghparast, M.: ‘Transient analysis of magnetohydrodynamic seawater thrusters with decaying magnetic field’, Ships Offsh. Struct., 2017, 12, (5), pp. 591598.
    5. 5)
      • 5. Faiz, J., Sharifian, M.: ‘Optimal design of an induction motor for an electric vehicle’, Int. T. Electr. Energy, 2006, 16, (1), pp. 1533.
    6. 6)
      • 6. Niemelä, M., Luukko, J., Pyrhönen, J., et al: ‘Position-sensorless direct-torque-controlled synchronous motor drive for ship propulsion’, Int. Trans. Electr. Energy, 2000, 10, (6), pp. 353360.
    7. 7)
      • 7. Mitchell, D., Gubser, D.: ‘Magnetohydrodynamic ship propulsion with superconducting magnets’, J. Supercond., 1988, 1, (4), pp. 349364.
    8. 8)
      • 8. Carlton, J.: ‘Broadband cavitation excitation in ships’, Ships Offsh. Struct., 2015, 10, (3), pp. 302307.
    9. 9)
      • 9. Doss, E., Roy, G.: ‘Flow characteristics inside MHD seawater thrusters’, J. Propuls. Power, 1991, 7, (4), pp. 635641.
    10. 10)
      • 10. Nishigaki, K., Sha, C., Takeda, M., et al: ‘Elementary study on superconducting electromagnetic ships with helical insulation wall’, Cryogenics, 2000, 40, (6), pp. 353359.
    11. 11)
      • 11. Lin, T., Marks, S., Gilbert, J.: ‘Sea water conductivity enhancement by acid seeding and the associated two-phase flow phenomena’. Int. Symp. on Superconducting MHD Ship Propulsion, Kobe, Japan, October 1991, pp. 367374.
    12. 12)
      • 12. Lin, T., Gilbert, J.: ‘Studies of helical magnetohydrodynamic seawater flow in fields up to twelve teslas’, J. Propuls. Power, 1995, 11, (6), pp. 13491355.
    13. 13)
      • 13. Lin, T., Aumiller, D., Gilbert, J., et al: ‘Analytical and experimental studies of the cyclic magnetohydrodynamic thruster designs’, Int. J. Offsh. Polar, 1993, 3, (04), pp. 9197.
    14. 14)
      • 14. Doss, E., Geyer, H.: ‘The need for superconducting magnets for MHD seawater propulsion’. Proc. of the 25th Intersoeiety Energy Conversion Engineering Conf. (IECEC), Reno, Nevada, August 1990, pp. 540545.
    15. 15)
      • 15. Jiang, H., Peng, Y., Zhao, L., et al: ‘Three-dimensional numerical simulation on helical channel MHD thruster’. IEEE Int. Conf. on Electrical Machines and Systems, Wuhan, China, October 2008, pp. 41504154.
    16. 16)
      • 16. Shahidian, A., Ghassemi, M., Khorasanizade, S., et al: ‘Flow analysis of non-Newtonian blood in a magnetohydrodynamic pump’, IEEE Trans. Magn., 2009, 45, (6), pp. 26672670.
    17. 17)
      • 17. Jamalabadi, M., Park, J.: ‘Electro-magnetic ship propulsion stability under gusts’, Int. J. Sci., Basic Appl. Res., 2014, 14, (1), pp. 421427.
    18. 18)
      • 18. Jamalabadi, M., Park, J., Lee, C.: ‘Optimal design of MHD mixed convection flow in a vertical channel with slip boundary conditions and thermal radiation effects by using entropy generation minimization method’, Entropy, 2015, 17, (2), pp. 866881.

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