A novel method for determining two-dimensional velocity flowfields has been developed. The technique, two-color particle-image velocimetry (PIV), is similar to existing PIV techniques except that two different-color laser sources are used to form the light sheets required for exposing the position of particles in a seeded flowfield. A green-colored laser sheet (formed by a doubled Nd:YAG laser) and a red-colored laser sheet (formed by a Nd:YAG-pumped dye laser) are employed sequentially to expose the particle positions which are recorded on 35-mm color film. Analysis of the resulting images involves digitizing the exposed film with color filters to separate the green- and red-particle image fields and processing the digitized images with velocity-displacement software. The two-color PIV technique has the advantage that direction, as well as particle displacement, is uniquely determined because the green-particle image occurs before the red one by a known time increment. Velocity measurements utilizing the two-color PIV technique on a propane jet diffusion flame have been made and are discussed.

3.
Yao
,
C. S.
and
R. J.
Adrian
(
1984
).
Appl. Opt.
23
:
1687
.
4.
Adrian
,
R. J.
, and
C. S.
Yao
(
1985
).
Appl. Opt.
24
:
44
.
6.
Landreth
,
C. C.
,
R. J.
Adrian
and
C. S.
Yao
(
1986
). “
Double-Pulsed Particle Image Velocimetry with Directional Resolution for Complex Flows
.”
Tenth Biennial Symposium on Turbulence
.
7.
Coupland
,
J. M.
,
C. J. D.
Pickering
and
N. A.
Halliwell
(
1987
).
Appl. Opt.
23
:
11
.
8.
Ruess
,
D. L.
,
R. J.
Adrian
,
C. C.
Landreth
,
D. T.
French
and
T. D.
Fansler
(
1989
) “
Instantaneous Planar Measurements of Velocity and Large-Scale Vorticity and Strain Rate in an Engine Using Particle-Image Velocimetry
.”
SAE International Congress and Exposition. SAE Technical Paper 890616
.
9.
Hiller
,
B.
,
R. A.
Booman
,
C.
Hassa
and
R. K.
Hanson
(
1984
).
Rev. Sci. instrum.
55
:
1964
.
10.
Miles
,
R. B.
,
J.
Connors
,
E.
Markovitz
,
P.
Howard
and
G.
Roth
(
1989
).
Phys. Fluids A.
1
:
389
.
12.
Hiller
,
B. J.
,
J. C.
McDaniel
,
J. E. C.
read
and
R. K.
Hanson
(
1983
).
Opt. Lett.
8
:
474
.
13.
McDaniel
,
J. C.
,
B.
Hiller
and
R. K.
Hanson
(
1983
).
Opt. Lett.
8
:
51
.
14.
Hiller
,
B.
, and
R. K.
Hanson
(
1985
).
Opt. Lett.
10
:
206
.
15.
Hiller
,
B.
, and
R. K.
Hanson
(
1988
).
Appl. Opt.
27
:
33
.
16.
Davis
,
R. W.
,
E. F.
Moore
,
L-D.
Chen
,
V.
Vilimpoc
,
L. P.
Goss
and
W. M.
Roquemore
(May,
1989
). “
Numerical/Experlmental Study of the Dynamic Structure of a Buoyant Jet Diffusion Flame
.”
1989 Spring Technical Meeting of the Central States Section of The Combustion Institute
.
17.
Davis
,
R. W.
,
E. F.
Moore
,
L-D.
Chen
,
V.
Vilimpoc
,
L. P.
Goss
and
W. M.
Roquemore
(May,
1989
). “
Preliminary Results of Numerical/Experlmental Study of a Buoyant Jet Diffusion Flame
.” Paper submitted to
Combust. Flame.
This content is only available via PDF.
You do not currently have access to this content.