Methanol
97
120
100
80
60
40
20
0 0
1 0
2 0
Penetration velociy (m/s)
30
40
50
12 MPa
15 MPa
18 MPa
18 MPa (diesel)
Penetration length (mm)
Figure 4.3
Effect of opening pressure on spray velocity. (From Yanfeng, G., Shenghua, L., and Yu, L.,
Energy and Fuels, 21, 2991–97, 2007. Reprinted with permission from ACS Publications.)
90
80
70
60
50
40
30
20
10
0
Penetration length (mm)
1 MPa
2 MPa
3 MPa
0
200
400
600
800
1000
1200
1400
1600
Time (µs)
Figure 4.4
Effect of ambient density on spray penetration. (From Yanfeng, G., Shenghua, L., and Yu, L.,
Energy and Fuels, 21, 2991–97, 2007. Reprinted with permission from ACS Publications.)
with the increase of nozzle diameter. Between 12 and 18 MPa, the opening pressure had little influence on the spray angle and the angle remained
nearly constant during the whole injection process. The spray cone angle
increased with the increase of the ambient density or the nozzle diameter.
Compared with diesel fuel, they found that the penetration of methanol was
shorter and the cone angle of methanol was larger under the same experimental conditions.