遠心羽根車の流動に関する研究 : 第2報,シュラウド付き羽根車の翼間流れ計測

Flow measurements were made in a shrouded centrifugal impeller, with much the same passage as the unshrouded impeller in the first report. A measured flow rate corresponded to a nearly zero incidence at the inlet. Using a five-holed pressure probe, the relative velocities and the reduced static pressures were measured on nine sectional planes within the passage of a shrouded impeller running at 1000 rpm. Influences of the secondary flow and the turbulent mixing on the wake were discussed, and the flows in this impeller passage were compared with that of the unshrouded impeller in the first report. The wake in the shrouded impeller occurs at the suction-side/shroud corner in the mid-passage of the impeller ; this region develops near the suction surface along the passage. The position of this wake differs from the region shown in the unshrouded impeller passage of the first report.