円形断面急拡大部の下流側壁面近傍の流動特性

概要

論文の詳細を見る
The flow field downstream of a sudden, circular channel expansion was classified into three regions: the jet and recirculation region, the reattachment region, and the redeveloping region. The limits between them were determined by the tuft method. An empirical formula for the reattachment length was proposed. The axial distributions of the root mean square value of pressure and heat transfer fluctuations on the wall of the larger pipe exhibited peak values. The peak positions agreed well with one another and they were located around the limit between the jet and recirculation region and the reattachment region. Also, the axial distribution of the turbulence intensity measured near the wall had a peak. Its position was in fairly good agreement with the positions of the above mentioned two peaks.
一般社団法人日本機械学会の論文
1988-11-25