Diesel combustion
CONSTANT VOLUME CHAMBER
Table
1 calculation condition
| |
Exp. (1) |
Cal. |
Ambient pressure MPa
Ambient temperature K
Fuels(Physical properties)
Fuel inj. pressure MPa
Fuel inj. duration ms
Fueling mg |
2.7
930
C12H26:22%,
C13H28:54%
C14H30:22%
55
3.7
12
|
2.7
970
C13H28:100%
80
3.7
17.6 |
-Chemical reaction mechanism and soot model
* Modified Chalmers diesel oil surogate
mechanism
* Waseda university the phenomenological soot model
-Figures
Fig.1 Predicted heat release rate
and chemical species profiles
(Injection timing : 0.1 msec.)
Fig.2 Predicted precusors and
soot mass profiles profiles
Fig.3 Predicted soot particles
number density and average diameter
-Movies Movies 0 - 18
msec.
min med.
max
(max, med., min)
equivalence
ratio (0, 1.25, 2.5)
temperature K (500, 1450, 2400)
OH ppm (0,
1000, 2000)
C2H2 ppm (0, 1000, 2000)
NO ppm
(0, 1000, 2000)
NO2
ppm (0, 50, 100)
Carbon ppm
(0, 500, 1000)
A2R5ppm
(0, 0.025, 0.05)
Soot num. density 1/cm3 (0,
3.E+11, 6.E+11)
Soot dia. cm (0, 0.01, 0.02)
|
(1)
H.Kosaka T. Aizawa and T. Kamimoto, Two-dimensional imaging of igition
and soot formation process in a diesel flame, IJER 6(1), 21-42,2005
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