レーザ干渉画像法による非定常噴霧流の粒径速度の空間分布計測(熱工学,内燃機関,動力など)

抄録

The present investigation describes an application of a novel measurement technique for determining both velocity vector field and spatial distribution of the particle size. The technique enables us to get a high-resolution spatial information of the particle characteristics by compressing the out-of-focused image into linear interferogram so as to maintain the information of the fringe spacing which is related to the particle diameter. The velocity of individual particles are obtained by capturing sequential images of interferogram with double pulsed laser illumination. The system consists of a high resolution CCD camera, large amount of data storage, high power pulsed laser source, high speed computer which are basically the same equipment as PIV system but with a fully automated image processing software. The technique was applied to the transient spray flow and the results of the simultaneous measurement of size and velocity fields demonstrated on the difference of the particle behavior by their individual diameter.