Affiliations: Graduate School, Korea Maritime University, Busan,
Korea. E-mail: [email protected] | Division of Mechanical and Information Engineering,
Korea Maritime University, Youngdo-ku, Dongsam-dong, Busan, 606-791,
Korea | The Univ. of Tokyo, Dept. of Quantum Eng. &
Systems Science, Hongo, Bunkyo-ku, Tokyo, Japan
Abstract: 4D-PTV system was constructed. The measurement system consists of
three high-speed high-definition cameras (1k × 1k, 2000 fps), Nd-Yag laser
(2000 Hz) and a host computer. The GA-3D-PTV algorithm was used for completing
the measurement system. The 4D-PTV is capable of probing the spatial
distribution of velocity vectors of the flow field overcoming the temporal
resolution of the characteristic turbulence length scales of the measured flow
fields. A horizontal impinged jet flow (H/D=7) was measured. The Reynolds
number is about 33,000. Spatial temporal evolution of the jet flow was examined
and physical properties such as spatial distributions of vorticity and
turbulent kinetic energy were obtained with the constructed system.
Keywords: 4D-PTV, GA-3D-PTV algorithm, Impinged Jet, Vortex Ring
