AM06-03-011 時系列Dual-Plane Stereoscopic PIVによる乱流微細構造の計測(乱流渦構造(3),一般講演)

概要

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To investigate fine scale structure of turbulent flows, time-resolved dual-plane stereoscopic particle image velocimetry (TRDPSPIV) system has been developed using high-repetition-rate Nd:YAG lasers for industrial processing and high-speed CMOS cameras. This system provides all three velocity components and nine velocity gradients with high spatial and temporal resolution. The developed system was applied to velocity measurements of a turbulent jet. It is shown that probability density functions of the measured nine velocity gradients agree well with those obtained from direct numerical simulation (DNS). From the results of TRDPSPIV, coherent fine scale eddies of turbulence are identified and those characteristics such as diameter and asymmetry are shown.
日本流体力学会の論文
2006-09-05