非定常翼理論とふれまわり遠心羽根車に働く非定常流体力

概要

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According to the classical unsteady airfoil theory, unsteady forces of an airfoil with steady loading consist of four terms : the quasi-steady term, the wake effect term, the apparent mass term and the term due to the interaction of steady vortices and unsteady velocities. In the present paper, unsteady airfoil theory is applied to a whirling centrifugal impeller. Its geometrical shape is simplified in order to neglect the effects of adjacent blades and to use the linear boundary conditions. The components of unsteady forces parallel and normal to the eccentricity F_γ, F_θ can be derived from the above-mentioned terms in a very simple way. From these results, the physical meaning of the whirling forces is easy to understand. This is a typical example to show the availability of analytical solutions.
一般社団法人日本機械学会の論文
1993-10-25