Dynamic coefficients and stability analysis of a water-lubricated hydrostatic bearing by solving the uncoupled Reynolds equation

Development of Pump-Drive Turbine Module with Hydrostatic Bearing for Supercritical CO2 Power Cycle Application

“…Bearing performance analysis was conducted based on the governing equation above, and the bearing stiffness and damping were calculated using the governing equation derived, using the perturbation method from Equation (1) [21,22]. The finite element method was used to conduct a numerical analysis, and 120 × 60 grids were used in the circumferential and axial directions.…”

“…To validate the hydrostatic bearing analysis model developed in the present study, the computed results were compared with the data available in [22]. The hydrostatic bearing in [22] was a water-lubricated radial bearing with four recesses; specifications of the bearing are listed in Table 2. For other information, the same conditions as those in [22] were applied.…”

“…The hydrostatic bearing in [22] was a water-lubricated radial bearing with four recesses; specifications of the bearing are listed in Table 2. For other information, the same conditions as those in [22] were applied. Figure 4 shows the predicted stiffness and damping according to changes in the rotating speed.…”

“…Figure 4 shows the predicted stiffness and damping according to changes in the rotating speed. The results in [22] and those calculated using the analysis program of the current study are presented herein. The analytical results demonstrate that the results from [22], and the calculations from the analysis program used in this study were within 5% of each other.…”

“…Ren et al theoretically investigated the performance of water-lubricated hydrostatic bearings for compressors through operating tests [21]. Subsequently, Du and Liang analyzed the dynamic performance of water-lubricated hydrostatic bearings [22].…”