電気光学効果シャッタ高速写真によるシリンダ内流速分布の可視化計測

概要

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The flow visualization technique was used to measure the in-cylinder flow of an internal combustion engine. In this paper, metaldehyde was used as a tracer of the gas flow and the PLZT was adopted as the shutter on the basis of its merit of electrical controllability. First, the flow velocity obtained by this measuring system and that from LDV were compared and found to be in agreement ; this demonstrated the validity of the measuring system. Two examples of the measured velocity were also shown. One is that cyclic variation of the in-cylinder flow and differences in the velocity on each radius at one moment existed. The other is that the rotational centers of the flow traces were calculated and found to distribute around the cylinder center at the compression stroke, gather near the cylinder center at the compression end, and distribute widely around the cylinder center at the expansion stroke.
社団法人日本機械学会の論文
1990-09-25