Numerical Investigation of the Effect of Air Leaking into the Working Fluid on the Performance of a Steam Ejector
This paper investigated the effect of air leaking into the working fluid on the performance of a steam ejector. A simulation of the mixing of air into the primary and secondary fluids was performed using CFD. The effects of air with a 0, 0.1, 0.3 and 0.5 mass fraction on the entrainment ratio and in...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-06-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/13/6111 |
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| author | He Li Xiaodong Wang Jiuxin Ning Pengfei Zhang Hailong Huang |
| author_facet | He Li Xiaodong Wang Jiuxin Ning Pengfei Zhang Hailong Huang |
| author_sort | He Li |
| collection | DOAJ |
| description | This paper investigated the effect of air leaking into the working fluid on the performance of a steam ejector. A simulation of the mixing of air into the primary and secondary fluids was performed using CFD. The effects of air with a 0, 0.1, 0.3 and 0.5 mass fraction on the entrainment ratio and internal flow structure of the steam ejector were studied, and the coefficient distortion rates for the entrainment ratios under these air mass fractions were calculated. The results demonstrated that the air modified the physical parameters of the working fluid, which is the main reason for changes in the entrainment ratio and internal flow structure. The calculation of the coefficient distortion rate of the entrainment ratio illustrated that the air in the primary fluid has a more significant impact on the change in the entrainment ratio than that in the secondary fluid under the same air mass fraction. Therefore, the air mass fraction in the working fluid must be minimized to acquire a precise entrainment ratio. Furthermore, this paper provided a method of inspecting air leakage in the experimental steam ejector refrigeration system. |
| first_indexed | 2024-03-10T09:53:26Z |
| format | Article |
| id | doaj.art-0f8cda84ba7b4efa88a2105c0b0a944a |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T09:53:26Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-0f8cda84ba7b4efa88a2105c0b0a944a2023-11-22T02:30:15ZengMDPI AGApplied Sciences2076-34172021-06-011113611110.3390/app11136111Numerical Investigation of the Effect of Air Leaking into the Working Fluid on the Performance of a Steam EjectorHe Li0Xiaodong Wang1Jiuxin Ning2Pengfei Zhang3Hailong Huang4School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, ChinaSchool of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, ChinaSchool of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, ChinaSchool of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, ChinaSchool of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, ChinaThis paper investigated the effect of air leaking into the working fluid on the performance of a steam ejector. A simulation of the mixing of air into the primary and secondary fluids was performed using CFD. The effects of air with a 0, 0.1, 0.3 and 0.5 mass fraction on the entrainment ratio and internal flow structure of the steam ejector were studied, and the coefficient distortion rates for the entrainment ratios under these air mass fractions were calculated. The results demonstrated that the air modified the physical parameters of the working fluid, which is the main reason for changes in the entrainment ratio and internal flow structure. The calculation of the coefficient distortion rate of the entrainment ratio illustrated that the air in the primary fluid has a more significant impact on the change in the entrainment ratio than that in the secondary fluid under the same air mass fraction. Therefore, the air mass fraction in the working fluid must be minimized to acquire a precise entrainment ratio. Furthermore, this paper provided a method of inspecting air leakage in the experimental steam ejector refrigeration system.https://www.mdpi.com/2076-3417/11/13/6111steam ejectorair mass fractionmixing layerentrainment ratiocoefficient distortion rateCFD model |
| spellingShingle | He Li Xiaodong Wang Jiuxin Ning Pengfei Zhang Hailong Huang Numerical Investigation of the Effect of Air Leaking into the Working Fluid on the Performance of a Steam Ejector Applied Sciences steam ejector air mass fraction mixing layer entrainment ratio coefficient distortion rate CFD model |
| title | Numerical Investigation of the Effect of Air Leaking into the Working Fluid on the Performance of a Steam Ejector |
| title_full | Numerical Investigation of the Effect of Air Leaking into the Working Fluid on the Performance of a Steam Ejector |
| title_fullStr | Numerical Investigation of the Effect of Air Leaking into the Working Fluid on the Performance of a Steam Ejector |
| title_full_unstemmed | Numerical Investigation of the Effect of Air Leaking into the Working Fluid on the Performance of a Steam Ejector |
| title_short | Numerical Investigation of the Effect of Air Leaking into the Working Fluid on the Performance of a Steam Ejector |
| title_sort | numerical investigation of the effect of air leaking into the working fluid on the performance of a steam ejector |
| topic | steam ejector air mass fraction mixing layer entrainment ratio coefficient distortion rate CFD model |
| url | https://www.mdpi.com/2076-3417/11/13/6111 |
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