Post on 23-Feb-2016
description
1
ECN
Gasoline Spray (Spray G)Topic 3.4 Drop size measurement
Scott Parrish (GM)
Spray G – Drop Sizing
2
ECNOptics
Collection angle (°) 35Refractive Index 1.39
Ch 1 Ch 2Wavelengths (nm) 532 491Focal length (mm) 320 320
Beam spacing (mm) 60 60Beam diameter (mm) 3.5 3.5Frequence Shift (MHz) 40 45
Fring spacing (μm) 2.9 2.9Beam waist diameter (μm) 61.9 59.2
Slit width (μm) variable (25-50)
Processors Set-UpFFT Bins 2048 2048
Analog filter (MHz) 80 80Variable Mixer (MHz) 45 35Sample Rate (MHz) 160 160
BD Decimation none noneAmplitude threashold (mV) 100 200
3
ECN
15 mm 10 mm
PDI Measurement Locations
Spray G – Drop Sizing (GM)
Note: perform preliminary measurements to identify center of plume
4
ECN13 mm Radial
Spray G – Drop Sizing (GM)
0 1 20
500
1000
1500Drop Count
Time (ms)
Cou
nt (-
)
Total Drops 6753
0 1 20
10
20
SMD
Time (ms)D
iam
eter
(um
) SMD 8.6Dv90 13.1
0 1 2
0
50
100Axial Velocity
Time (ms)
Vel
ocity
(m/s
) Mean 16.4Max 67.8
0 1 2
0
50
100Radial Velocity
Time (ms)
Vel
ocity
(m/s
) Mean 11.7Max 63.0
15 mm
5
ECN Spray G – Drop Sizing (GM)
0 1 20
500
1000
1500Drop Count
Time (ms)
Cou
nt (-
)
Total Drops 4643
0 1 20
10
20
SMD
Time (ms)D
iam
eter
(um
) SMD 9.7Dv90 14.8
0 1 2
0
50
100Axial Velocity
Time (ms)
Vel
ocity
(m/s
) Mean 37.6Max 95.0
0 1 2
0
50
100Radial Velocity
Time (ms)
Vel
ocity
(m/s
) Mean 11.0Max 56.1
15 mm
10 mm Radial
6
ECN Spray G – Drop Sizing (GM)
Radial Scan
15 mm 10 mm
Transverse Scan
7
ECN
20
40
60
80
100
120
0
5
10
15
20
25
0 0.1 0.2 0.3 0.4
Axia
l Vel
ocity
(m/s
)
Axia
l Pen
etra
tion
(mm
)
Time ASOI (ms)
Axial Penetrtion and Velocity
Spray G – Drop Sizing (GM)
8
ECN Spray G – Drop Sizing (GM)
Radial Scan
15 mm 10 mm
Transverse Scan
9
ECN Spray G – Drop Sizing (GM)
0 1 20
500
1000
1500Drop Count
Time (ms)
Cou
nt (-
)
Total Drops 4461
0 1 20
10
20
SMD
Time (ms)D
iam
eter
(um
) SMD 8.1Dv90 12.4
0 1 2
0
50
100Axial Velocity
Time (ms)
Vel
ocity
(m/s
) Mean 9.7Max 53.2
0 1 2
0
50
100Radial Velocity
Time (ms)
Vel
ocity
(m/s
) Mean 5.0Max 37.8
15 mm
-3 mm Transverse
10
ECN Spray G – Drop Sizing (GM)
0 1 20
500
1000
1500Drop Count
Time (ms)
Cou
nt (-
)
Total Drops 2537
0 1 20
10
20
SMD
Time (ms)D
iam
eter
(um
) SMD 7.7Dv90 12.7
0 1 2
0
50
100Axial Velocity
Time (ms)
Vel
ocity
(m/s
) Mean 7.9Max 64.8
0 1 2
0
50
100Radial Velocity
Time (ms)
Vel
ocity
(m/s
) Mean 3.5Max 44.7
15 mm
3 mm Transverse
11
ECN Spray G – Drop Sizing (GM)
200 μs
12
ECN Spray G – Drop Sizing (GM)
400 μs
13
ECN Spray G – Drop Sizing (GM)
600 μs
14
ECN Spray G – Drop Sizing (GM)
800 μs
15
ECN Spray G – Drop Sizing (GM)
1000 μs