Paper 2.4
Comparison of PIV and SPIV in Application to Industrial Spray Burner
Virginia Palero, Yuji Ikeda, Tsuyoshi Nakajima
Kobe University
Rokkodai, Nada, Kobe 657-8501 JAPAN
Joseph Shakal
TSI Inc. Laser Diagnostics Division,
St Paul, Minnesota, USA
ABSTRACT
The purpose of this paper is to investigate and evaluate Stereoscopic PIV (SPIV) in spray measurements. The system
studied here is a gun-type burner (figure 1) used for practical industrial oil furnaces of 0.1 MW and spray measurement
is done under no reacting condition. The SPIV angular displacement method has been implemented. Several parametric
studies have been done in order to optimize the most suitable stereoscopic angle for our particular set-up (22.5º) and
also to estimate SPIV accuracy.
SPIV has been compared with PDA (SMD and size-classified PDA) showing good agreement specially between SPIV
data and PDA velocities obtained for particles smaller than 30 m. Figure 2 shows the swirl component contours
obtained with both techniques.
In-plane velocity components obtained with PIV are affected by an error because of the out-of-plane component.
Therefore, SPIV will provide, not only the out-of-plane component, but also will correct the in-plane components. In
this paper SPIV has been compared also with PIV in order to determine the magnitude of this correction. SPIV corrects
the in-plane velocity components in a 10% of the maximum measured velocity.
Igniter
1.5
1 . 25
1
0 . 75
0.5
0 . 25
0
-0 . 25
-0 . 5
-0 . 75
-1
-1 . 25
-1 . 5
50
40
r
30
6
Throat
unit : mm
20
10
0
Figure 1 Gun-type burner
m /s
60
m /s
1. 5
1. 2 5
1
0. 7 5
0. 5
0. 2 5
0
- 0. 2 5
50
40
x (m m )
60
Nozzle
10
P D A s w i rl c o m p o n e n t
S P IV s w i r l c o m p o n e n t
Baffle plate
x (m m )
x
φ 97.6
φ 80
Slit
- 0. 5
- 0. 7 5
-1
- 1. 2 5
- 1. 5
30
20
10
0
10
r (m m )
20
30
0
0
10
r (m m )
20
30
(a)
(b)
Figure 2 Swirl component contours obtained by: (a) SPIV, (b)
PDA