K. Ikeda et al., Measurement of three-dimensional density and velocity distributions using HPIV (Evaluation of simultaneous recording and filtering extraction), JSME I J B, 43(2), 2000, pp. 155-161
Citations number
9
Categorie Soggetti
Mechanical Engineering
Journal title
JSME INTERNATIONAL JOURNAL SERIES B-FLUIDS AND THERMAL ENGINEERING
In this study, a technique for simultaneous measurement of three-dimensiona
l density and velocity distributions was evaluated. Holographic particle im
age velocimetry (HPIV) was used to reconstruct three-dimensional velocity d
istributions from three-dimensional particle images recorded on a hologram.
Optical tomography (OT) was used to reconstruct three-dimensional density
distributions from multidirectional two-dimensional interferogram images. W
hen a flow field with density variation was illuminated by coherent plane w
aves, spherical waves were scattered by the particles (particle images), an
d the illuminating beam was modulated by the density variation (interferogr
am images). Using a reference beam, both particle and interferogram images
could be recorded on a single hologram. Using the spatial filtering extract
ion (FX) technique, information on both images could be extracted separatel
y from the hologram. In the experiment, a jet of helium gas introduced into
air containing small particles was measured. Both particle position and fr
inge shift caused by the density variation could be observed, demonstrating
the effectiveness of the proposed technique.