遠心羽根車に働くふれまわり流体力の実験的研究 : 第2報,ベーンドディフューザ中でふれまわる場合 (<小特集>タ-ボ機械の内部流れと定常・否定常特性)

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  • Experimental Study of Fluid Forces on Whirling Centrifugal Impeller. 2nd Report, Impeller in Vaned Diffuser.
  • ターボ機械の内部流れと定常・非定常特性　遠心羽根車に働くふれまわり流体力の実験的研究　第２報，ベーンドディフューザ中でふれまわる場合

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Fluid forces acting on a rotating centrifugal impeller in whirling motion are studied experimentally. In the first report, a two-dimensional impeller installed in a parallel-walled vaneless diffuser was used. Here in the second report, fluid forces on a three-dimensional impeller in a vaned diffuser are investigated when it is forced to whirl on a circular orbit with a constant eccentricity. The experimental apparatus is improved to be able to synchronize the whirling phase with the rotating one. Although a strong interaction between rotor vanes and guide vanes is observed at a certain specific whirling ratio, the fluid forces averaged throughout one whirling period, which are dominant for the stability of the rotating system, exert a damping effect on the rotor under most operating conditions.

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