sepientr34 OP t1_j6ilrae wrote on January 30, 2023 at 4:28 PM

Reply to comment by CrushAtlas in Eli5 Why gas turbine can rev at >10000 rpm but diesel engine red lone at 3000-4000 rpm? by sepientr34

Why don't gas turbine have trouble burning fuel fast enough but diesel has (I never see sooth from gas turbine engine!)

Fred2718 t1_j6iqqah wrote on January 30, 2023 at 4:59 PM

Older aircraft jet engines could be very smoky, especially at low altitudes. This was a problem for many reasons, e.g. military stealth is tough when the bad guy can see your smoke trail from 30 klicks. The one I'm familiar with is the CJ805 on the Convair 990 circa 1970, and you could see it on landing approach from 5 minutes away.

Sand_Trout t1_j6ioo90 wrote on January 30, 2023 at 4:46 PM

Gas turbines can do a continuous burn to build pressure, limited only to the total flow of fuel and air.

Diesels are pulsed ignition, and are limited to how much fuel+air can fit in the cylinder without igniting early.

lowflier84 t1_j6ip1x4 wrote on January 30, 2023 at 4:49 PM

Gas turbines produce soot, just like any other engine.

sepientr34 OP t1_j6ip5nw wrote on January 30, 2023 at 4:49 PM

I know still do not as much as diesel engine

[deleted] t1_j6irffr wrote on January 30, 2023 at 5:04 PM

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