METHOD AND APPARATUS FOR THREE-DIMENSIONAL DIGITAL PARTICLE IMAGE THERMOMETRY AND VELOCIMETRY

摘要

A 3D Digital Particle Image Thermometry and Velocimetry (3DDPIT/V) system and method is described. By combining Three-Dimensional Particle Tracking Velocimetry (3 DPTV) and Digital Particle Image Thermometry (DPIT) into one system, this technique provides simultaneous temperature and velocity data measurements using temperature-sensitive thermochromic liquid crystal particles (TLC) as flow sensors. An optional custom water-filled prism corrects for astigmatism caused by off-axis imaging. Six CCD cameras comprise the imaging system, with three allocated for velocity measurements and three, combined in one custom-made color camera, for temperature measurements. The cameras are optically aligned to sub-pixel accuracy using a precision grid and high-resolution translation stages. One or more high-intensity custom-designed Xenon flash lamps provide illumination. Temperature calibration of the TLC particle is then performed.