The Relationship between Contraction of the Ejector Mixing Chamber and Supersonic Jet Mixing Layer Development
Supersonic mixing layer development seriously impacts on the performance of an ejector, and the effect of mixing chamber contraction angle on supersonic jet mixing has been poorly studied. Numerical simulations are applied to investigate the effect of the mixing chamber contraction angle (<i>φ...
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MDPI AG
2022-08-01
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| Series: | Aerospace |
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| Online Access: | https://www.mdpi.com/2226-4310/9/9/469 |
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| author | Qi Jing Wanwu Xu Wei Ye Zhiyan Li |
| author_facet | Qi Jing Wanwu Xu Wei Ye Zhiyan Li |
| author_sort | Qi Jing |
| collection | DOAJ |
| description | Supersonic mixing layer development seriously impacts on the performance of an ejector, and the effect of mixing chamber contraction angle on supersonic jet mixing has been poorly studied. Numerical simulations are applied to investigate the effect of the mixing chamber contraction angle (<i>φ</i>) on the performance of a central ejector and supersonic mixing layer development pattern. The main findings of this study are as follows: the non-mixed length (<i>l</i>) is reduced by 22.12% when the mixing chamber contraction angle (<i>φ</i>) increases from 2° to 6°. Meanwhile, the secondary stream mass flow rate (<i>m<sub>s</sub></i>) is reduced by 35.02%, and the total pressure loss is decreased by 18.37% at the outlet. <i>l</i> is positively correlated with <i>m<sub>s</sub></i> and negatively correlated with the mixing layer thickness (<i>σ</i>). The mixing layer thickness (<i>σ</i>) grows highly linearly before the secondary flow is covered completely. The pressurization (<i>P<sub>0δ</sub></i>/<i>P<sub>0s</sub></i>) performance of the mixing layer will be progressively weaker than the total pressure loss because of the complex shock structure. |
| first_indexed | 2024-03-10T01:03:54Z |
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| id | doaj.art-d7ed321a1792422d90e74d7aee97ecec |
| institution | Directory Open Access Journal |
| issn | 2226-4310 |
| language | English |
| last_indexed | 2024-03-10T01:03:54Z |
| publishDate | 2022-08-01 |
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| series | Aerospace |
| spelling | doaj.art-d7ed321a1792422d90e74d7aee97ecec2023-11-23T14:30:27ZengMDPI AGAerospace2226-43102022-08-019946910.3390/aerospace9090469The Relationship between Contraction of the Ejector Mixing Chamber and Supersonic Jet Mixing Layer DevelopmentQi Jing0Wanwu Xu1Wei Ye2Zhiyan Li3College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, ChinaCollege of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, ChinaCollege of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, ChinaCollege of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, ChinaSupersonic mixing layer development seriously impacts on the performance of an ejector, and the effect of mixing chamber contraction angle on supersonic jet mixing has been poorly studied. Numerical simulations are applied to investigate the effect of the mixing chamber contraction angle (<i>φ</i>) on the performance of a central ejector and supersonic mixing layer development pattern. The main findings of this study are as follows: the non-mixed length (<i>l</i>) is reduced by 22.12% when the mixing chamber contraction angle (<i>φ</i>) increases from 2° to 6°. Meanwhile, the secondary stream mass flow rate (<i>m<sub>s</sub></i>) is reduced by 35.02%, and the total pressure loss is decreased by 18.37% at the outlet. <i>l</i> is positively correlated with <i>m<sub>s</sub></i> and negatively correlated with the mixing layer thickness (<i>σ</i>). The mixing layer thickness (<i>σ</i>) grows highly linearly before the secondary flow is covered completely. The pressurization (<i>P<sub>0δ</sub></i>/<i>P<sub>0s</sub></i>) performance of the mixing layer will be progressively weaker than the total pressure loss because of the complex shock structure.https://www.mdpi.com/2226-4310/9/9/469ejectormixing chambernon-mixed lengthmixing layer thicknesspressurization performance |
| spellingShingle | Qi Jing Wanwu Xu Wei Ye Zhiyan Li The Relationship between Contraction of the Ejector Mixing Chamber and Supersonic Jet Mixing Layer Development Aerospace ejector mixing chamber non-mixed length mixing layer thickness pressurization performance |
| title | The Relationship between Contraction of the Ejector Mixing Chamber and Supersonic Jet Mixing Layer Development |
| title_full | The Relationship between Contraction of the Ejector Mixing Chamber and Supersonic Jet Mixing Layer Development |
| title_fullStr | The Relationship between Contraction of the Ejector Mixing Chamber and Supersonic Jet Mixing Layer Development |
| title_full_unstemmed | The Relationship between Contraction of the Ejector Mixing Chamber and Supersonic Jet Mixing Layer Development |
| title_short | The Relationship between Contraction of the Ejector Mixing Chamber and Supersonic Jet Mixing Layer Development |
| title_sort | relationship between contraction of the ejector mixing chamber and supersonic jet mixing layer development |
| topic | ejector mixing chamber non-mixed length mixing layer thickness pressurization performance |
| url | https://www.mdpi.com/2226-4310/9/9/469 |
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