Steady-State Characteristics of Spiral Groove Floating Ring Gas-film Seal Considering Temperature-Viscosity Effect
During the operation of the floating ring gas film seal, a certain amount of heat is generated inside the seal gap, giving rise to thermal deformation of the seal rings, and further leading to operation unstable and increased leakage rate. Based on the gas lubrication theory, the control equations o...
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| Format: | Article |
| Language: | English |
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Isfahan University of Technology
2023-01-01
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| Series: | Journal of Applied Fluid Mechanics |
| Subjects: | |
| Online Access: | https://www.jafmonline.net/article_2188_2af127c1ddb331267df6917169c131c6.pdf |
| _version_ | 1811170911238225920 |
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| author | W. Shipeng D. Xuexing D. Junhua W. Jingmo |
| author_facet | W. Shipeng D. Xuexing D. Junhua W. Jingmo |
| author_sort | W. Shipeng |
| collection | DOAJ |
| description | During the operation of the floating ring gas film seal, a certain amount of heat is generated inside the seal gap, giving rise to thermal deformation of the seal rings, and further leading to operation unstable and increased leakage rate. Based on the gas lubrication theory, the control equations of gas pressure and gas film thickness of the floating ring gas film seal are obtained. And the energy and temperature-viscosity equation are also introduced. The above equations were solved by the finite difference method and their correctness was verified by experiments. The variation of opening force, leakage rate, friction force, and gas film temperature rise with rotating speed, inlet pressure, and eccentricity were analyzed. The results reveal that, for leakage rate, the difference between the modeled and tested values is only 2.94% at high speeds, taking into account the influence of the temperature-viscosity effect. The experiment substantiates that the temperature-viscosity effect model is scientifically valid. Operation parameters also have different effects on sealing performance. Compared with isothermal flow, the pressure distribution in the gas film flow field will change significantly with increasing gas temperature, which means that the temperature-viscosity effect cannot be neglected in the flow field calculation. These results provide grounds for further study of the thermoelastic effect of air film seal of floating ring and have important engineering significance. |
| first_indexed | 2024-04-10T17:04:34Z |
| format | Article |
| id | doaj.art-dcd5f6ed81a64ed9bfb75b8c601e932c |
| institution | Directory Open Access Journal |
| issn | 1735-3572 1735-3645 |
| language | English |
| last_indexed | 2024-04-10T17:04:34Z |
| publishDate | 2023-01-01 |
| publisher | Isfahan University of Technology |
| record_format | Article |
| series | Journal of Applied Fluid Mechanics |
| spelling | doaj.art-dcd5f6ed81a64ed9bfb75b8c601e932c2023-02-06T07:55:55ZengIsfahan University of TechnologyJournal of Applied Fluid Mechanics1735-35721735-36452023-01-0116489190410.47176/jafm.16.04.14322188Steady-State Characteristics of Spiral Groove Floating Ring Gas-film Seal Considering Temperature-Viscosity EffectW. Shipeng0D. Xuexing1D. Junhua2W. Jingmo3College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, ChinaCollege of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, ChinaCollege of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, ChinaCollege of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, ChinaDuring the operation of the floating ring gas film seal, a certain amount of heat is generated inside the seal gap, giving rise to thermal deformation of the seal rings, and further leading to operation unstable and increased leakage rate. Based on the gas lubrication theory, the control equations of gas pressure and gas film thickness of the floating ring gas film seal are obtained. And the energy and temperature-viscosity equation are also introduced. The above equations were solved by the finite difference method and their correctness was verified by experiments. The variation of opening force, leakage rate, friction force, and gas film temperature rise with rotating speed, inlet pressure, and eccentricity were analyzed. The results reveal that, for leakage rate, the difference between the modeled and tested values is only 2.94% at high speeds, taking into account the influence of the temperature-viscosity effect. The experiment substantiates that the temperature-viscosity effect model is scientifically valid. Operation parameters also have different effects on sealing performance. Compared with isothermal flow, the pressure distribution in the gas film flow field will change significantly with increasing gas temperature, which means that the temperature-viscosity effect cannot be neglected in the flow field calculation. These results provide grounds for further study of the thermoelastic effect of air film seal of floating ring and have important engineering significance.https://www.jafmonline.net/article_2188_2af127c1ddb331267df6917169c131c6.pdfgas sealmicrogroovethermo-hydrodynamic lubricationhydrodynamic effectnumerical simulationlubrication performance |
| spellingShingle | W. Shipeng D. Xuexing D. Junhua W. Jingmo Steady-State Characteristics of Spiral Groove Floating Ring Gas-film Seal Considering Temperature-Viscosity Effect Journal of Applied Fluid Mechanics gas seal microgroove thermo-hydrodynamic lubrication hydrodynamic effect numerical simulation lubrication performance |
| title | Steady-State Characteristics of Spiral Groove Floating Ring Gas-film Seal Considering Temperature-Viscosity Effect |
| title_full | Steady-State Characteristics of Spiral Groove Floating Ring Gas-film Seal Considering Temperature-Viscosity Effect |
| title_fullStr | Steady-State Characteristics of Spiral Groove Floating Ring Gas-film Seal Considering Temperature-Viscosity Effect |
| title_full_unstemmed | Steady-State Characteristics of Spiral Groove Floating Ring Gas-film Seal Considering Temperature-Viscosity Effect |
| title_short | Steady-State Characteristics of Spiral Groove Floating Ring Gas-film Seal Considering Temperature-Viscosity Effect |
| title_sort | steady state characteristics of spiral groove floating ring gas film seal considering temperature viscosity effect |
| topic | gas seal microgroove thermo-hydrodynamic lubrication hydrodynamic effect numerical simulation lubrication performance |
| url | https://www.jafmonline.net/article_2188_2af127c1ddb331267df6917169c131c6.pdf |
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