Thermohydrodynamic Performance of a Journal Bearing With 3d-Surface Roughness and Fluid Inertia Effects

Prasad, Eswar; Nagaraju, T. Vamsi; Sagar, J. Prem

doi:10.47893/ijarme.2012.1044

Cited by 4 publications

(1 citation statement)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A large number of scholars analyzed the static characteristics of sliding bearings under the premise of temperature variation. [10][11][12][13][14][15][16][17] At the same time, changes in temperature rise within the bearing are often due to friction, and excessive temperature rise can also cause damage and failure behavior of the bearing. 18,19 Mannan Abdul et al 20 investigated the effects of temperature on the lubrication and wear behavior of roller bearings.…”

Section: Introductionmentioning

confidence: 99%

Analysis of lubrication performance and flow field for lead-bismuth bearings considering the temperature-viscosity effect

Yun,

Zhao,

Sun

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

Lead-bismuth bearing performance and dynamic properties are crucial for ensuring the steady operation of lead-bismuth liquid metal pumps since they are one of the primary supporting elements in the lead-bismuth cold fast reactor system. To study and analyze the lubrication performance of lead-bismuth bearings as well as the influence of the viscous-temperature property of lead-bismuth medium on the bearing load performance, a hydrodynamic model based on CFD (Computational Fluid Dynamics) is established. The performance of lubrication comprises addressing the static and dynamic properties of lead-bismuth bearings. The pressure and temperature flow fields of the Lead-bismuth bearing under various working conditions were determined by solving the N-S equation and energy equation. The numerical findings demonstrate a clear strip-like distribution in the temperature and pressure flow fields of the lead-bismuth bearing. The pressure flow distribution in the working and feedback grooves is symmetrical, the temperature flow distribution is isotropic, and the temperature increase is mostly proportional to the rotation speed. As the rotation speed becomes larger, the force in the y-direction, power loss, and leakage flow rate all increase. Bearings with small radius clearance and greater rotation speeds have superior stability than those with big radius clearance and lower speeds. The findings of this paper serve as a point of reference for the study of the viscosity-temperature effect and lubrication theory of lead-bismuth bearings and supply the foundation for subsequent rotor dynamics calculations.

show abstract

Section: Introductionmentioning

confidence: 99%

Analysis of lubrication performance and flow field for lead-bismuth bearings considering the temperature-viscosity effect

Yun,

Zhao,

Sun

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

show abstract

The Influence of Modified Viscosity-Temperature Equation on Thermohydrodynamic Analysis of Plain Journal Bearing

Kadam¹,

Banwait²,

Laroiya³

2014

AJME

View full text Add to dashboard Cite

In this paper a thermohydrodynamic analysis has been done to investigate the influence of modified viscosity-temperature equation on plain journal bearing. This analysis is based on the numerical solution of threedimensional energy equation coupled with Reynolds equation and the heat conduction equation in the journal bearing. Reynolds equation for the pressure distribution and the energy equation for the temperature distribution were used for this analysis. Finite element method was used to solve the Reynolds equation. By solving the generalized Reynolds equation, hydrodynamic pressure was found out. Finite difference method was used for predicting temperature distribution in journal bearing. The Fourier heat conduction equation in the non-dimensional cylindrical coordinate has been adopted for finding the temperature distribution in the bush. The temperature distribution along axial direction of the journal has been found out using a steady-state unidirectional heat conduction equation.

show abstract

Stability of Flexibly supported Finite Oil Journal Bearings including Fluid Inertia and surface Roughness Effect: A Non-linear Transient Analysis

Bandyopadhyay¹,

Mazumder²,

Majumdar³

2017

IJERT

View full text Add to dashboard Cite

The aim of this study is to analyse the Non-linear transient stability of finite oil journal bearing including the effect of fluid inertia and bearing surface roughness. The inertia effect is usually ignored in view of its negligible contribution compared to viscous force.However,fluid inertia effect is to be taken in the analysis when modified Reynolds number is around one.This investigation deals with the stability of flexibly supported finite rough oil journal bearing with fluid film inertia effect using finite difference method.An attempt has been made to evaluate the critical mass parameter. A non-linear time transient method is used to simulate the journal centre trajectory to estimate the stability parameter,which is a function of speed. In the present work,a modified form of Reynolds equation is developed to include the combined influence of fluid inertia and surface roughness for the analysis of finite oil journal bearing.The modified average Reynolds equation considering inertia effect with flow simulation model of rough surfaces (Patir and Cheng [1, 2] is solved by a finite difference method with a successive over-relaxation scheme (Gauss-Siedel),while the equation of motion of both the journal and bearing are solved by the fourth-order Runge-Kutta method. The stability increases with the increase of eccentricity ratio and modified Reynold's numbers.

show abstract

Thermohydrodynamic Performance of a Journal Bearing With 3d-Surface Roughness and Fluid Inertia Effects

Cited by 4 publications

References 19 publications

Analysis of lubrication performance and flow field for lead-bismuth bearings considering the temperature-viscosity effect

Analysis of lubrication performance and flow field for lead-bismuth bearings considering the temperature-viscosity effect

The Influence of Modified Viscosity-Temperature Equation on Thermohydrodynamic Analysis of Plain Journal Bearing

Stability of Flexibly supported Finite Oil Journal Bearings including Fluid Inertia and surface Roughness Effect: A Non-linear Transient Analysis

Contact Info

Product

Resources

About