ケーシング抽気孔が高比速度斜流送風機の内部流れに及ぼす影響(G05-10 流体機械(2),G05 流体工学部門一般講演)

概要

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Bleed holes were made on casing nearby center of chord of a high specific speed diagonal flow fan, stall characteristic and pressure rise characteristic in low flow range improved by natural bleeding low momentum fluid accumulated between blade and blade. In this study, difference of influence of characteristic with various location of bleed holes which were added forth bleed hole newly was tested, in addition, static pressure on the surface of a wall of the casing nearby the tip of the rotor were measured by use of the Phase-Locked technique to investigate mechanism of influence of characteristic. There was appeared location of the breakdown of tip leakage vortex was controlled by bleed holes just behind location of the leakage vortex breakdown and by an amount of bleeding.
2004-09-04