スワール強度の軸方向成層化による圧縮行程中の乱れの制御について

概要

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In our previous study, it was found experimentally by LDV measurements that a large-scale annular vortex is formed during the compression stroke at a swirl case, and this vortex generates and transports turbulence. This report elucidates the above phenomena by means of a mathematical calculation: when an axial stratification of swirl intensity exists, a large-scale annular vortex is formed during the compression stroke by an interaction between the piston motion and the axial pressure gradient. This trend is enhanced when the swirl intensity is the highest at the piston top surface and the lowest at the bottom surface of the cylinder head. Based on this result, a new concept is proposed to control the turbulence generation during the compression stroke.
社団法人日本機械学会の論文
1991-05-25