Linear Stability Analysis of Hydrodynamic Journal Bearings with a Flexible Liner and Micropolar Lubrication |
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| Authors: | Pikesh Bansal Ajit K. Chattopadhayay Vishnu P. Agrawal |
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| Affiliation: | 1. Mechanical Engineering Department, Faculty of Engineering and Technology, Mody Institute of Technology and Science, Lakshmangarh 332311, Rajasthan, India;2. Mechanical Engineering Department, Thapar University, Patiala 147001, Punjab, India |
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| Abstract: | A linear stability analysis of hydrodynamic journal bearings is presented, including the effects of elastic distortion of the liner and micropolar lubrication. Hydrodynamic equations of the lubricant and equations of motion of the journal are solved simultaneously with the deformation equations for the bearing surface to predict the fluid film pressure distributions theoretically. The components of stiffness and damping coefficients, critical mass parameter, and whirl ratio, which reflect the dynamic characteristic of the journal bearing, are calculated for varying eccentricity ratio taking into account the flexibility of the liner and the micropolar properties of the lubricant. The results presented show that stability decreases with an increase in the value of the elasticity parameter of the bearing liner and micropolar fluids exhibit better stability in comparison to Newtonian fluids. |
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| Keywords: | Micropolar Fluid Hydrodynamic Lubrication Elasticity of Liner Non-Newtonian Behavior |
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