二色LIF感温粒子を用いた三次元温度速度同時計測

抄録

A temperature sensitive particle, which can be utilized for the three-dimensional simultaneous measurement of velocity and temperature, has been developed by introducing two fluorescent dyes into the microparticle and its thermo-optical characteristics are quantified. Even though the particle involving a fluorescent substance inside has the temperature sensitivity according to the LIF technique, the intensity of the fluorescence also depends upon the size of the particle and the intensity of the excitation light and thus the multiple-point temperature measurement with this particle was not very easy. Presently, by introducing two fluorescent materials with different temperature sensitivities into the particle, the quantitative temperature measurements with different sizes of particles can now be performed. A three-dimensional simultaneous measurement of velocity and temperature in the turbulent natural convection layer has also been carried out by introducing the two-color LIF particles. The results of the temperature measurement showed a reasonable agreement with DNS data.