Effect of Ambient Gas Temperature
High-Speed Schlieren Movies of Diesel Sprays
| Parameter | Low Gas Temperature | Moderate Gas Temperature | High Gas Temperature |
|---|---|---|---|
| Ambient O2 [%] | 21 | 21 | 21 |
| Ambient Temperature [K] | 800 | 1000 | 1200 |
| Ambient Density [kg/m3] | 28 | 28 | 28 |
| ΔPinj [MPa] | 138 | 138 | 138 |
| Orifice Diameter [mm] | 0.260 | 0.260 | 0.260 |
Fuel is #2 diesel fuel. Injector tip to wall is 109 mm.
The ignition delay (time from start of injection until start of combustion) decreases with increasing ambient temperature. After start of combustion, the spray penetration rate is approximately the same.