Non-Vaporizing vs Vaporizing Sprays

High-Speed Schlieren Movies of Diesel Sprays
ParameterNon-vaporizingVaporizing
Ambient O2 [%]00
Ambient Temperature [K]4511000
Ambient Density [kg/m3]3029
ΔPinj [MPa]138139
Orifice Diameter [mm]0.2000.200

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Fuel is #2 diesel fuel. Injector tip to wall is 109 mm.

The vaporizing spray penetrates more slowly than the non-vaporizing spray. This is because the spray contracts as a result of cooling of hot entrained gases by fuel evaporation (Naber, 1996).