4 Modelling and Analysis of the Oil-Film Pressure of a Hydrodynamic Journal Bearing Lubricated by Nano-based Biolubricants Using a D-Optimal Design
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S. Baskar
Abstract
Synthetic lubricants with nano-additives have seen greater improvements in recent times. However, the information about the performance peculiarities of nano-based biolubricants in actual machines is scarce. Oil-film pressure is one of the crucial parameters when developing a new lubricant that describes the operating conditions in hydrodynamic lubrication regimes. To fill this gap, a response surface methodology (RSM) based on D-optimal design was employed to model and analyse the oil-film pressure of a hydrodynamic journal bearing, lubricated by nano-based biolubricants and a synthetic lubricant (SAE 20W40). The analysis was executed by selecting the bearing load and speed as numerical factor and synthetic/nano-based biolubricants as the categorical factor, to evaluate the lubricant’s oil-film pressure. The results showed that RSM based on D-optimal design was influential in the selection of suitable lubricant for a typical system, especially for the hydrodynamic journal bearing used in internal combustion engines. A bearing load of 2 kN, a speed of 1,000 rpm and a bronze bearing material lubricated with chemically modified rapeseed oil (CMRO) as the biolubricant dispersed with nano-CuO had the lowest oil-film pressure. Furthermore, the scanning electron microscopy analysis of the tested bearing surfaces lubricated with CMRO containing nano-CuO showed smoother than with a synthetic lubricant and other nano-based biolubricants.
Abstract
Synthetic lubricants with nano-additives have seen greater improvements in recent times. However, the information about the performance peculiarities of nano-based biolubricants in actual machines is scarce. Oil-film pressure is one of the crucial parameters when developing a new lubricant that describes the operating conditions in hydrodynamic lubrication regimes. To fill this gap, a response surface methodology (RSM) based on D-optimal design was employed to model and analyse the oil-film pressure of a hydrodynamic journal bearing, lubricated by nano-based biolubricants and a synthetic lubricant (SAE 20W40). The analysis was executed by selecting the bearing load and speed as numerical factor and synthetic/nano-based biolubricants as the categorical factor, to evaluate the lubricant’s oil-film pressure. The results showed that RSM based on D-optimal design was influential in the selection of suitable lubricant for a typical system, especially for the hydrodynamic journal bearing used in internal combustion engines. A bearing load of 2 kN, a speed of 1,000 rpm and a bronze bearing material lubricated with chemically modified rapeseed oil (CMRO) as the biolubricant dispersed with nano-CuO had the lowest oil-film pressure. Furthermore, the scanning electron microscopy analysis of the tested bearing surfaces lubricated with CMRO containing nano-CuO showed smoother than with a synthetic lubricant and other nano-based biolubricants.
Chapters in this book
- Frontmatter I
- Preface V
- About the editor VI
- Contents VII
- List of contributing authors XI
- 1 Tribological Materials – An Ecosustainable Perspective 1
- 2 Preparation and Tribology Performance of Bio-based Ceramic Particles from Rice Waste 39
- 3 Tribological Behavior and Tribochemistry of Ti3SiC2 in Water and Alcohols 65
- 4 Modelling and Analysis of the Oil-Film Pressure of a Hydrodynamic Journal Bearing Lubricated by Nano-based Biolubricants Using a D-Optimal Design 73
- 5 Wear Performance of Oil Palm Seed Fibre-Reinforced Polyester (OpSeFRP) Composite Aged in Brake Fluid Solutions 93
- Index 121
Chapters in this book
- Frontmatter I
- Preface V
- About the editor VI
- Contents VII
- List of contributing authors XI
- 1 Tribological Materials – An Ecosustainable Perspective 1
- 2 Preparation and Tribology Performance of Bio-based Ceramic Particles from Rice Waste 39
- 3 Tribological Behavior and Tribochemistry of Ti3SiC2 in Water and Alcohols 65
- 4 Modelling and Analysis of the Oil-Film Pressure of a Hydrodynamic Journal Bearing Lubricated by Nano-based Biolubricants Using a D-Optimal Design 73
- 5 Wear Performance of Oil Palm Seed Fibre-Reinforced Polyester (OpSeFRP) Composite Aged in Brake Fluid Solutions 93
- Index 121
