遠心羽根車の翼端漏れに基づく二次流れと流れ特性(流体工学,流体機械)

概要

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Flow measurements were made in an unshrouded centrifugal impeller by using a hot-wire anemometer for a flow rate corresponding to nearly zero incidence angle. The relative velocity, the dissipation and the turbulence kinetic energy were measured on seven cross-sectional planes along the rotating impeller passage. The results were investigated by correlating to a secondary flow in the passage. About the passage inlet, the regions of the velocity and total pressure with low values and the dissipation and turbulence kinetic energy with high values appear near the casing due to the effects of a passage curvature and a blade tip leakage. About the middle passage, such regions develop at the middle blade-to-blade of the casing side by the addition of a secondary flow to the tip leakage. About the passage outlet, the secondary flow weakens in the passage. However, such regions enlarge near the suction from the casing side because of the passagewise rotary pressure gradient.
社団法人日本機械学会の論文
2003-04-25