Performance Analysis of Capillary Compensated Hybrid Journal Bearing by Considering Combined Influence of Thermal Effects and Micropolar Lubricant

Abstract

The viscous dissipation of micropolar lubricant results in temperature increase of hole-entry hybrid journal bearing. Thermohydrostatic (THS) performance characteristics are computed by the concurrent solution of micropolar Reynolds, micropolar energy, and conduction equations. The results obtained numerically indicate that bearing is significantly affected by increase in temperature. Hence, it is essential to consider the thermal effects for bearing operating with micropolar lubricant to produce realistic bearing characteristic data.

Investigation of the micropolar lubricant and thermal effects in the slot entry hybrid journal bearings

“…The parameters listed in Table 1 have been taken from the previous published literature. 16,19,20 Lubricant film temperature ð…”

“…The complete solution procedure is shown in Figure 2. Block MPLR computes the nodal pressure values by using the system equations 19,20 and restrictor equation 4. Final equilibrium pressure values are transferred to block MENRGY for the computation of convergence in the pressure and temperature values is obtained (MITPR ¼ 1).…”

“…The finite element formulation of the modified Reynolds equation, heat transfer equations along with respective boundary conditions have been explained by the authors in their previous work. 19,20 However, the lubricant flow in the nondimensional form for slot entry hybrid journal bearing is given as 16

Figure 1.Configuration of the slot entry hybrid journal bearing.

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A Study on the Influence of Combined Elastic and Micropolar Effects on Hole-Entry Hybrid Journal Bearing

“…Also, Bansal et al [22] highlighted elastic distortion effects on stability of micropolar lubricated hydrodynamic bearing and their results indicated that increase in flexibility causes decrease in stability. Various studies concerning the theory of micropolar lubricant and effects of micropolar parameters on performance and stability of journal bearings have also been reported in literature [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39].…”

Theoretical and Experimental Investigations of the Rotor Vibration Amplitude of the Turbocharger and Bearings Temperature

“…The obtained results demonstrated that: for highly loaded bearings operating at low speed, critical parameters are film thickness and maximum pressure; for high speed operating bearings submitted to a light load, the shaft being almost centered, heating becomes very significant and maximum temperature becomes the critical parameter. Pankaj Khatak and H.C. Garg [6] analyzed of the capillary compensated hybrid journal bearing by considering combined influence of thermal effects and a micropolar lubricant. The results obtained by numerically indicate that the bearing is significantly affected by increase in temperature.…”