Oil Cavitation Morphology Analysis of Textured Cylindrical Rotating Friction Pair on Circular-Disk End Faces
Abstract
:1. Introduction
2. Governing Equations
2.1. Homogeneous Equilibrium Model
2.2. Turbulence Equations
2.3. Cavitation Equations
2.4. Fluid Mechanics Equations
- (1)
- There is no relative slippage on the contact surface of fluid oil and friction disks.
- (2)
- The disks are always parallel to each other without bias grinding, the oil film thickness is always greater than 0, and there is no convex peak contact.
- (3)
- The flow field flow is laminar flow.
- (4)
- The effect of volume force and inertia terms are neglected and only the effect of centrifugal terms is considered.
- (5)
- Neglecting the axial movement of oil.
3. Model Analysis
3.1. Geometric Model
3.2. CFD Model
3.3. Mesh Model
3.4. Viscosity–Temperature Relationship
4. Simulation Analysis
4.1. Cavitation at Different Texture Rates
4.2. Cavitation Velocity Field Analysis
4.3. Cavitation Pressure Field Analysis
4.4. Mass-Transfer Analysis
5. Experiment Analysis
5.1. Experiment Design
5.2. Experiment Results
6. Conclusions
7. Patents
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Parameters | Value |
---|---|
Inner radius r1 (mm) | 27 |
Outer radius r2 (mm) | 32 |
Oil film thickness h0 (mm) | 0.1 |
Texture depth ht (mm) | 0.0564 |
Scheme | Radial Layers | Circumferential Layers | O-Grid Layers | Number of Meshes | Volume Fraction of Cavitation λv | |
---|---|---|---|---|---|---|
Textured Area | Non-Textured Area | |||||
1 | 102 | 33 | 84 | 3 | 145,322 | 0.0004345 |
2 | 132 | 66 | 84 | 6 | 335,483 | 0.0003432 |
3 | 142 | 77 | 124 | 7 | 391,840 | 0.000467 |
4 | 142 | 77 | 124 | 7 | 438,463 | 0.0005012 |
5 | 210 | 121 | 160 | 11 | 988,637 | 0.0006212 |
6 | 210 | 121 | 124 | 11 | 1,607,374 | 0.0006417 |
7 | 210 | 165 | 160 | 15 | 2,017,702 | 0.0006419 |
Parameter | Oil | Vapor |
---|---|---|
Density (kg/m3) | 865 | 0.023 |
Specific heat capacity (J/kg·K−1) | 2093.5 | 1911.6 |
Coefficient of heat conduction (m·K) | 0.12 | 0.0185 |
Dynamic viscosity (Pa·s) | Interpolation function | 9.86 × 10−6 |
Saturated vapor pressure (Pa) | 1000 | 1000 [40] |
Parameters | Value | Parameters | Value |
---|---|---|---|
Output power | 70% | Laser wavelength | 1064 ± 5 nm |
Laser processing speed | 500 mm/s | Processing speed | 1000 mm/s |
Spot diameter | 0.05 mm | Repetition accuracy | ±0.003 nm |
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Sun, J.; Chen, L.; Qian, P.; Zhang, B. Oil Cavitation Morphology Analysis of Textured Cylindrical Rotating Friction Pair on Circular-Disk End Faces. Machines 2022, 10, 1036. https://doi.org/10.3390/machines10111036
Sun J, Chen L, Qian P, Zhang B. Oil Cavitation Morphology Analysis of Textured Cylindrical Rotating Friction Pair on Circular-Disk End Faces. Machines. 2022; 10(11):1036. https://doi.org/10.3390/machines10111036
Chicago/Turabian StyleSun, Junyu, Liyu Chen, Pengfei Qian, and Bing Zhang. 2022. "Oil Cavitation Morphology Analysis of Textured Cylindrical Rotating Friction Pair on Circular-Disk End Faces" Machines 10, no. 11: 1036. https://doi.org/10.3390/machines10111036
APA StyleSun, J., Chen, L., Qian, P., & Zhang, B. (2022). Oil Cavitation Morphology Analysis of Textured Cylindrical Rotating Friction Pair on Circular-Disk End Faces. Machines, 10(11), 1036. https://doi.org/10.3390/machines10111036