An Influence of Fluid Inertia Forces on the Dynarnic Characteristics of Tilting-pad Journal Bearings in Turbulent Flow

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In this paper, an influence of fluid inertia forces on the dynamic characteristics of tilting-pad journal bearings in turbulent flow is investigated theoretically. Applying the generalized turbulent lubrication equation with inertia effects to the centrally pivoted 2-pads journal bearings, the dynamic oil film forces are obtained. And linearizing the forces around the static equilibrium position under the assumption of a small displacement of journal center, the static and dynamic characteristics such as the Sommerfeld number, the dynamic oil film coefficients and the pad critical mass are calculated for three slenderness ratios, λ= 0.6, 1.0 and 2.0. It is found that the fluid inertia forces affect significantly the dynamic oil film coefficients but insignificantly the Sommerfeld number and the pad critical mass.
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