Squeeze processes in a narrow circular damper with highly compressible porous layer imbibed with liquids

Abstract

Squeeze film dampers are widely used technical components for turbomachinery as a means to reduce the amplitude of rotor vibration owing to unbalance. This article proposes a different type of circular damper using highly compressible porous layers (HCPL) imbibed with Newtonian liquids. The elastic forces of the HCPL solid phase are negligible compared to the hydrodynamic forces generated within the porous layer. Such processes were named ex-poro-hydrodynamic (XPHD). The Kozeny–Carman equation was used to compute permeability in function of porosity/compacticity. Analytical and numerical solutions were performed for the impact process of the partial and full narrow circular dampers in XPHD conditions. The results were compared with the case of the classical squeeze film damper. The damping capacity of a HCPL imbibed with Newtonian liquid was found to be considerably greater than that of the Newtonian liquid layer.

Keywords

circular damper porous medium compliant layer damping capacity

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