用胶囊式液晶粒子同时测量流场的温度和速度

SIMULTANEOUS FLUID VELOCITY AND TEMPERATURE MEASUREMENTS BY USING ENCAPSULATED LIQUID CRYSTAL PARTICLES

胆甾相液晶在不同温度下显示不同的颜色，这一特性已被广泛地应用于固体表面或流体的温度测量．胶囊式胆甾相液晶具有粒子形态和温度－颜色反应特性，可以用来同时测量流体的速度和温度场．作者改进了粒子测速的测试精度；还标定了色度－温度关系。

Chrolestic liquid crystal shows different color under different temperature, and this property has been used to measure the temperature on a solid surface or in a fluid. Encapsulated chrolestic liquid crystals has particlate shape and temperature color reactive property which can be used to measure velocity field and temperature field simultaneously. In this paper the particle image processing method was improved and the higher velocity accuracy was obtained in the large velocity gradient area. The hue temperature relation was calibrated. The velocity field and temperature field of natural convection are shown.