Magnetohydrodynamic apparatus

Electrical generator or motor structure – Dynamoelectric – Conducting fluid

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H02K 4404

Patent

active

056684207

ABSTRACT:
An MHD apparatus includes a solenoid coil that is symmetrically positioned about a central axis aperture. Upon energization, the coil produces an intense magnetic field along the central axis and within the aperture. A first cylinder having a first diameter is positioned in the aperture and a second cylinder which exhibits a second diameter that is less than the first diameter is positioned within the first cylinder. A helical web insulator is positioned between the first cylinder and the second cylinder and provides a helical fluid flow channel between first and second ends of the cylinders. A DC power supply is connected between the first and second cylinders, which produces a current flow that interacts with the magnetic field to exert an MHD propulsive force on seawater within the fluid flow channel. In this mode of operation, the apparatus pumps the saltwater or provides a thrust. When a flow of a conductive fluid is introduced through the helical channel, it enables an electric potential between the first cylinder and the second cylinder in the presence of the axial magnetic field. In this mode of operation, the apparatus delivers an output current when connected to a load. The MHD apparatus thus exhibits a relatively long path wherein the seawater interacts with both the radial electric field and the axial magnetic field.

REFERENCES:
patent: 4906877 (1990-03-01), Ciaio
patent: 5298818 (1994-03-01), Tada
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"Considerations of Sea Water Conductivity Enhancement for Electromagnetic Thrusters", T. Lin, Proc. 25th Inter-Society Energy Conversion Engy. Conf. vol. 5, pp. 552-556. Date unknown.
"Study of the Influence of Electric and magnetic Fields on Seawater Magnetohydrodynamic Propulsion", T. Lin et al. Proc. of the 2nd (1992) In't. Offshore and Polar Engineering Conf. San Francisco, Jun. 1992.
"Analytical and Experimental Studies of the Helical Magnetohydrodynamic Thruster Design", J. Gilbert et al., Proc. of the 4th (1994) In't Offshore and Polar Engin. Conf. Osaka, Japan Apr. 10-15, 1994.
"Analytical and Experimental Studies of the Cyclic Magnetohydrodynamic Thruster Designs", D. Aumiller et al., Proc. 3rd Int. Offshore and Polar Energy Conf. vol. I, pp. 46-53. Date unknown.
"Seawater Conductivity Enhancement by Acid Seeding for Magnetohydrodynamic Propulsion", J. Gilbert et al. 27th Joint Propulsion Conf. Jun. 24-26, 1991/Sacramento, CA.

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