遠心羽根車内の流れ計測

概要

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Flow patterns in three typical centrifugal impellers have been studied using 3-hole probes which are fixed on the rotating probe traverse unit. These three impellers, A,B, and C are a 2-dimensinal impeller with small outlet blade angle, a 2-dimensional impeller with large outlet blade angle, and a 3-dimensional impeller with large specific speed, respectively. The velocity and pressure distributions in these impellers were measured and compared with each other. The detailed measurements showed the location of separation, and secondary flow. Separation was observed in B impeller on the blade suction surface at lower flow rates. In A impeller, on the other hand, no separation was observed within the tested flow range In C impeller, secondary flow due to the large meridional curvature was seen. Low velocity region and low energy region were observed to move their locations as the flow rate changed.
社団法人日本機械学会の論文
1984-10-25