Do a jet engine’s turbines actively pull air into the engine once the turbines begin to spin? (Both during the starter motor phase and also during flight at higher speeds)
And does the front half of the engine produce a substantial amount of drag as it is travelling at high speeds? (not including the thrust coming from the back)
If anyone could help it would be much appreciated!
*I’m thinking about axial and turbofan jet engines, but am curious about all types, *apart from pulse jets*
Cheers!
In: 3
Generally speaking, jet engines has 6 main parts; fan, compressor, combustor, turbine, mixer and nozzle. The fan pulls air in, a compressor compresses the air. Then fuel is added in the combustor. The fuel air mixture is ignited with an ignition source which forces the mixture of gasses to rapid expand and shoot out the nozzle providing thrust. As the gasses pass through the nozzle it passes over a turbine which is connected to the compressor via a shaft. Spinning the turbine spins the compressor. The nozzle may be preceded by a mixer which combines the hot air coming from the engine with the lower temperature air that was bypassed at the fan. The mixer helps to make the engine quieter.
Check out this link from nasa for more information on each type of jet engine.
https://www.grc.nasa.gov/www/k-12/UEET/StudentSite/engines.html
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