emissions from turboa fan engine
emissions from turboa fan engine
(OP)
I don't realy know what causes NOx and PM formation they say that diesel engines produce those since there is excess air and high burning temperature but I know that ICE burning process is not continouse like it is in a turbofan engine where oil is conntinously burned in a burner. Does PM and NOx even form when we have continous burning process and if so how can you threat turbo fan emissions, since I don't see how you can add catalizators to the turbo jet or turbo fan engine. Catalizators are restrictors in flow and turbo jet engine won't work with those restrictions or will work jet less efficient than now.
RE: emissions from turboa fan engine
So a gas turbine running hotter will generate more NOx.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: emissions from turboa fan engine
I put my boiler's pilot together without the gas orifice. The rich flame literally choked it with soot, and made a CO hazard until I fixed it.
Another easy experiment is lighting a welder's torch, acetylene first. The floating black soot from a continuous flame is I think one source of the carbon used in carbon fibre. Turning the O2 on makes the soot go away. My Mercedes 240D can lays a little smoke and soot because it's probably running on original 34 year old injectors, that only worked so well to begin with. Newer heads, injectors, arrangements and Common rail diesels with multi-event piezoelectric injectors smoke a lot less or a whole lot less. Stoich or lean 02 is required, and good atomomization/evaporation is required for a clean burn, because a burning droplet has a boundary layer of combustion product and less O2 around it. In a jet engine, combustion chamber design, fuel injector design, fuel control and maintenance all probably matter to limit PM/soot.
As for NOx, this looks like an interesting paper. It says that the flight profile can be optimized wrt NOx production: http://www.icas.org/ICAS_ARCHIVE/ICAS2008/PAPERS/5...
RE: emissions from turboa fan engine
RE: emissions from turboa fan engine
Piston aircraft engines, being air cooled, also have higher NOx emissions, and the avgas they burn still contains some lead.