Experimental and numerical investigation of two phase ejector performance with the water injected into the induced flow
When injectors are used in petroleum industries or sea water desalination system, it is a special case that the induced gas is accompanied by water, the ejector is in two-phase operation. In the present study, the ejector performance at two phase flow is investigated experimentally and numerically....
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2020-01-01
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| Series: | International Journal of Advanced Nuclear Reactor Design and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2468605020300016 |
| _version_ | 1818418861115965440 |
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| author | WeiXiong Chen ChenXi Huang YuPing Bai DaoTong Chong JunJie Yan JiPing Liu |
| author_facet | WeiXiong Chen ChenXi Huang YuPing Bai DaoTong Chong JunJie Yan JiPing Liu |
| author_sort | WeiXiong Chen |
| collection | DOAJ |
| description | When injectors are used in petroleum industries or sea water desalination system, it is a special case that the induced gas is accompanied by water, the ejector is in two-phase operation. In the present study, the ejector performance at two phase flow is investigated experimentally and numerically. The results indicate that: the entrainment ratio would decrease when the water is injected into the induced flow, as well as the pressure ratio. The maximum decrement of entrainment ratio is around 40.5% at sub-critical mode when the motive pressure is 1.0 MPa, the induced pressure is 0.2 MPa, liquid-air ratio is 22%. For the pressure ratio, the maximum decrement is 62.5% when the motive pressure is 1.0 MPa, the induced pressure is 0.5 MPa, liquid-air ratio is 2.87%. However, the lower the induced pressure is, the more obvious the effect of mass flow rate on entrainment rate is, while the effect on pressure ratio is just opposite. Moreover, the performance becomes worse in sub-critical mode than that in critical mode. The effect of NXP on ejector performance also has been analyzed. There exists an optimum NXP whether the two phase flow ejector is in critical mode or sub-critical mode. The optimum NXP for entrainment ratio enlarges from 3.6 mm to 4.4 mm with the increase of water mass flowrate, and is bigger than that of single phase ejector (the optimum NXP is 2.8 mm). This study may provide a beneficial reference for the operation of supersonic ejectors on two phase flow. |
| first_indexed | 2024-12-14T12:29:24Z |
| format | Article |
| id | doaj.art-08f09ea95f0d4aee9c29627c1e35d941 |
| institution | Directory Open Access Journal |
| issn | 2468-6050 |
| language | English |
| last_indexed | 2024-12-14T12:29:24Z |
| publishDate | 2020-01-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | International Journal of Advanced Nuclear Reactor Design and Technology |
| spelling | doaj.art-08f09ea95f0d4aee9c29627c1e35d9412022-12-21T23:01:14ZengKeAi Communications Co., Ltd.International Journal of Advanced Nuclear Reactor Design and Technology2468-60502020-01-0121524Experimental and numerical investigation of two phase ejector performance with the water injected into the induced flowWeiXiong Chen0ChenXi Huang1YuPing Bai2DaoTong Chong3JunJie Yan4JiPing Liu5State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an, 710049, ChinaState Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an, 710049, ChinaState Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an, 710049, ChinaCorresponding author.; State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an, 710049, ChinaState Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an, 710049, ChinaState Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an, 710049, ChinaWhen injectors are used in petroleum industries or sea water desalination system, it is a special case that the induced gas is accompanied by water, the ejector is in two-phase operation. In the present study, the ejector performance at two phase flow is investigated experimentally and numerically. The results indicate that: the entrainment ratio would decrease when the water is injected into the induced flow, as well as the pressure ratio. The maximum decrement of entrainment ratio is around 40.5% at sub-critical mode when the motive pressure is 1.0 MPa, the induced pressure is 0.2 MPa, liquid-air ratio is 22%. For the pressure ratio, the maximum decrement is 62.5% when the motive pressure is 1.0 MPa, the induced pressure is 0.5 MPa, liquid-air ratio is 2.87%. However, the lower the induced pressure is, the more obvious the effect of mass flow rate on entrainment rate is, while the effect on pressure ratio is just opposite. Moreover, the performance becomes worse in sub-critical mode than that in critical mode. The effect of NXP on ejector performance also has been analyzed. There exists an optimum NXP whether the two phase flow ejector is in critical mode or sub-critical mode. The optimum NXP for entrainment ratio enlarges from 3.6 mm to 4.4 mm with the increase of water mass flowrate, and is bigger than that of single phase ejector (the optimum NXP is 2.8 mm). This study may provide a beneficial reference for the operation of supersonic ejectors on two phase flow.http://www.sciencedirect.com/science/article/pii/S2468605020300016Two phase flow ejectorEntrainment ratioPressure ratio |
| spellingShingle | WeiXiong Chen ChenXi Huang YuPing Bai DaoTong Chong JunJie Yan JiPing Liu Experimental and numerical investigation of two phase ejector performance with the water injected into the induced flow International Journal of Advanced Nuclear Reactor Design and Technology Two phase flow ejector Entrainment ratio Pressure ratio |
| title | Experimental and numerical investigation of two phase ejector performance with the water injected into the induced flow |
| title_full | Experimental and numerical investigation of two phase ejector performance with the water injected into the induced flow |
| title_fullStr | Experimental and numerical investigation of two phase ejector performance with the water injected into the induced flow |
| title_full_unstemmed | Experimental and numerical investigation of two phase ejector performance with the water injected into the induced flow |
| title_short | Experimental and numerical investigation of two phase ejector performance with the water injected into the induced flow |
| title_sort | experimental and numerical investigation of two phase ejector performance with the water injected into the induced flow |
| topic | Two phase flow ejector Entrainment ratio Pressure ratio |
| url | http://www.sciencedirect.com/science/article/pii/S2468605020300016 |
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