流れ場の画像計測における高速相関法

概要

論文の詳細を見る
Particle image velocimetry (PIV) is a useful tool in the study of transient fluid flow phenomena, The light of a laser sheet scattered by seeding particles generates a moving particle-image pattern. This pattern is recorded using a multiple-exposure photographic technique, where the distance between corresponding particle images in the interrogation region is proportional to the local displacement. To determine the direction of the velocity vector from the multiple-exposure photograph, a velocity bias technique is used. The processing techniques for PIV data have traditionally been tedious and time-consuming. In this paper, a new approach to PIV data processing is presented. The 2-D intensity distribution array in the interrogation region is replaced by two orthogonal 1-D distribution arrays using integration. Each velocity component is extracted by autocorrelation of the 1-D array. This system has been applied to a quantitative measurement of the vortical structure behind a circular cylinder.
一般社団法人日本機械学会の論文
1994-06-25