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Good afternoon #EUROAVIAns✈! Today's #FactFriday

Good afternoon #EUROAVIAns✈!
Today's #FactFriday talks about jet propulsion by microwave plasma:

What is plasma?
Similarly to solids, liquids, and gases, plasma is a normal state of matter. Plasma naturally arises due to the ionization of molecules at high temperatures🌡 (such as in the sun☀️) or in high electric fields (such as in lightning⚡).

What is it?
This new plasma jet engine differs from the already known Xenon plasma in spacecraft, in that it exerts a large propulsion force and could be used within the Earth’s atmosphere where air friction is present.
It works by using high-temperature and high-pressure plasma generated by a 2.45 GHz microwave ionization chamber for injected pressurized air which, in terms of propulsion forces, is comparable to a commercial jet engine✈!

How does it work?
A microwave signal📡 is generated in the Magnetron (see figure) and is passed the circulator, reaching the waveguide. A quartz tube is inserted near the end to direct the plasma exhaust. Then, an igniter generates a plasma jet by igniting the ionized gas and forming a plasma which, in turn, generates thrust. As air can enter the quartz tube, it forms a vortex that keeps the jet stable in the tube.

The future!
The article suggests that, if put in series, these plasma jet engines could generate a comparable thrust to that of a commercial jet, whilst not using fossil fuels and thus being carbon-emission-free🍀!

Here's the link to the article: https://aip.scitation.org/doi/pdf/10.1063/5.0005814

#fact #friday #students #euroavia #propulsion #plasma #news

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