直噴式ディーゼル機関のシリンダ内空気流動のLDV測定と数値解析

概要

論文の詳細を見る
The swirl velocity in the combustion bowl of a DI diesel engine was measured by means of the laser droppler velocimetery, varying the swirl intensity and engine speed. At the same time, an axisymmetrical two dimentional laminar model for simulating the incylinder are motion was presented. The boundary condition of the flow near the wall was investigated with a comparison of predicted and measured swirl velocity, and as a result the free slip condition was found to be suitable for the present model. From a comparison between measured and theoretical swirl velocity, it was turned out that the secondary flow in the combustion bowl induced by an interaction between the squish and swirl flow transfers various swirl velocity from various points to a fixed point where a complicated time variation of the swirl velocity is observed.
一般社団法人日本機械学会の論文
1985-02-25