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The unsteady numerical simulation of fluid field and structural transient   dynamic analysis of axial flow pump were carried out at three operating   conditions based on fluid-structure interaction method. Numerical results   show that the maximum equivalent stress of impeller occurs at the joint   region of the impeller blade root and the hub, and the maximum deformation of   impeller occurs at the tips of blade leading edges. The frequency-domain of   the maximum equivalent stress and outlet pressure fluctuation of impeller are   mainly affected by the impeller blade passing frequency

Numerical investigation of blade dynamic characteristics in an axial flow pump