MHD generator with own hands

Obtaining electrical energy is very important for modern mankind. For this, new methods of obtaining electric energy in magnetohydrodynamic generators (MHD) are being searched for. How to build an MHD generator with your own hands, too, is of considerable interest.

How to build an MHD generator with your own hands, too, is of considerable interest

The MHD generator works as follows. When fuel is combusted, the gas in the working chamber is at a temperature of several thousand degrees and, naturally, strongly ionized. The ionization can be increased by adding additives containing cesium, calcium and potassium. The resulting plasma is blown through a channel of variable cross-section, placed in a strong magnetic field with high velocity. At the same time, electrons and ions are acted upon by forces that deflect them either to the upper or lower electrodes. An electric current appears.

How to assemble an MHD generator with your own hands? In such a model, the ionized gas can be replaced by an electrolyte stream (solution of potassium bromide, sodium chloride), which will show not only the existence of free ions, but also the presence of a deflecting force acting on the ions in the magnetic field.

MHD generator with its own hands is a plexiglass rectangular bar 120x26x18 mm with a cylindrical channel 12 mm in diameter, drilled along the entire length along which two copper or brass stripes of segmental section are connected, connected to the terminals. On the edges of such MHD generator, made by own hands are inserted aluminum nipples for connection of rubber tubes. To the front and back faces of the bar glued plexiglass cylinders, which are wearing ceramic ring magnets with a diameter of 20 mm.

For each ion of the current electrolyte, the Lorentz deflecting force acts:

F = qVB

In this case, the ions are separated and an electric field arises, the Coulomb forces of which counterbalance the Lorentz force:

qE = qVB.

From here:

E = U/d = VB, U = dVB.

Here U is the potential difference between the electrodes, V is the velocity of the ions (flux), B is the magnetic field induction, d is the distance between the electrodes.

MHD generator allows to put a series of amusing experiments on the dependence of the emf. from the induction of the magnetic field (changing the number of magnets), flow rates, ion concentrations, their charge and mass.

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