LN10 - Internal Combustion Engines MIXTURE PREPERATION in...

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1 Internal Combustion Engines MIXTURE PREPERATION in CI ENGINES Prof.Dr. Cem Soru ş bay Internal Combustion Engines Mixture Preperation ¾ Introduction ¾ Atomization of fuel, sprays ¾ Fuel systems - in-line systems, distributor systems ¾ Common-rail systems, unit pump and unit injector systems
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2 Fuel Atomization In Diesel engines, fuel-air mixture is prepared as a result of fuel injection into the cylinder at the end of compression stroke (usually before TDC) during a limited time (crank angle) interval. The purpouse of fuel injection is to provide good mixing of air and fuel in the limited time available, by increasing the surface area of the liquid fuel as a result of atomization Dividing unit fuel volume into droplets of 100 x 10 -6 [m] diameter would increase the total surface area by 10,000 times. Liquid Atomization Liquid atomization is effected by internal and external forces. controlled by Reynolds number defining the balance between inertia effects and viscous effects Re = ρ u D / µ
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This note was uploaded on 10/04/2011 for the course ME 422 taught by Professor Cemsoruşbay during the Spring '11 term at Yeditepe Üniversitesi.

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LN10 - Internal Combustion Engines MIXTURE PREPERATION in...

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