Abstract
Superimposed axial flow causes an entrance pressure loss due to fluid inertia: the Lomakin effect. The present study aims to investigate its influence on stationary bearing performance. A new method applied to simulation data reveals that the Lomakin effect plays an important role and that the corresponding loss coefficient shows a pronounced circumferential distribution. Furthermore, a new model is derived which accounts for fluid inertia and includes Reynolds’ equation as limiting case for negligible inertia. The loss coefficient distribution is supplied to both the new model and Reynolds’ equation. The results show that correct treatment of the Lomakin effect is essential for prediction accuracy. The new model is nearly as accurate as the simulations while Reynolds’ equation shows significant discrepancies.
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