Non-Vaporizing vs Vaporizing Sprays
High-Speed Schlieren Movies of Diesel Sprays
| Parameter | Non-vaporizing | Vaporizing |
|---|---|---|
| Ambient O2 [%] | 0 | 0 |
| Ambient Temperature [K] | 451 | 1000 |
| Ambient Density [kg/m3] | 30 | 29 |
| ΔPinj [MPa] | 138 | 139 |
| Orifice Diameter [mm] | 0.200 | 0.200 |
Download movie
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).