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Bypass ejector with an annular cavity in the nozzle wall to increase the entrainment: Experimental and numerical validation

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  • Zhu, Yinhai
  • Jiang, Peixue

Abstract

A bypass ejector geometry with an annular cavity in the nozzle wall was tested for various operating conditions to evaluate the entrainment performance. The results were compared with those of a conventional ejector. The data shows that the primary mass flow rate in the bypass ejector is always about 20% less than that in the conventional ejector. The results show that the bypass ejector is better than the conventional ejector at relatively high primary and secondary flow pressures with a maximum improvement in the entrainment performance of 31.5%. The bypass ejector has better entrainment performance in the critical mode. Since most ejectors operate in the critical mode, this ejector will have many applications requiring more entrainment.

Suggested Citation

  • Zhu, Yinhai & Jiang, Peixue, 2014. "Bypass ejector with an annular cavity in the nozzle wall to increase the entrainment: Experimental and numerical validation," Energy, Elsevier, vol. 68(C), pages 174-181.
    • Handle: RePEc:eee:energy:v:68:y:2014:i:c:p:174-181
    DOI: 10.1016/j.energy.2014.02.046
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    2. Tang, Yongzhi & Liu, Zhongliang & Shi, Can & Li, Yanxia, 2018. "A novel steam ejector with pressure regulation to optimize the entrained flow passage for performance improvement in MED-TVC desalination system," Energy, Elsevier, vol. 158(C), pages 305-316.
    3. Tang, Yongzhi & Liu, Zhongliang & Li, Yanxia & Shi, Can & Lv, Chen, 2019. "A combined pressure regulation technology with multi-optimization of the entrainment passage for performance improvement of the steam ejector in MED-TVC desalination system," Energy, Elsevier, vol. 175(C), pages 46-57.
    4. Karthick, S.K. & Rao, Srisha M.V. & Jagadeesh, G. & Reddy, K.P.J., 2018. "Experimental parametric studies on the performance and mixing characteristics of a low area ratio rectangular supersonic gaseous ejector by varying the secondary flow rate," Energy, Elsevier, vol. 161(C), pages 832-845.
    5. Chen, Jianyong & Li, Yunhai & Chen, Weixiong & Luo, Xianglong & Chen, Ying & Yang, Zhi & Eames, Ian W., 2018. "Investigation of the ejector nozzle in refrigeration system," Energy, Elsevier, vol. 157(C), pages 571-587.
    6. Song, Tao & Tian, Jinyi & Ni, Long & Shen, Chao & Yao, Yang, 2018. "Experimental study on enhanced separation of a novel de-foulant hydrocyclone with a reflux ejector," Energy, Elsevier, vol. 163(C), pages 490-500.
    7. Zheng, Ping & Li, Bing & Qin, Jingxuan, 2018. "CFD simulation of two-phase ejector performance influenced by different operation conditions," Energy, Elsevier, vol. 155(C), pages 1129-1145.
    8. Yiming Zhao & Haoran Li & Dapeng Hu & Minghao Liu & Qing Feng, 2022. "Study on the Performance of Collaborative Production Mode for Gas Wave Ejector," Sustainability, MDPI, vol. 14(12), pages 1-21, June.
    9. Jafarian, Ali & Azizi, Mohammad & Forghani, Pezhman, 2016. "Experimental and numerical investigation of transient phenomena in vacuum ejectors," Energy, Elsevier, vol. 102(C), pages 528-536.
    10. Bodys, Jakub & Smolka, Jacek & Palacz, Michal & Haida, Michal & Banasiak, Krzysztof & Nowak, Andrzej J. & Hafner, Armin, 2016. "Performance of fixed geometry ejectors with a swirl motion installed in a multi-ejector module of a CO2 refrigeration system," Energy, Elsevier, vol. 117(P2), pages 620-631.
    11. Shan, Yong & Zhang, Jing-zhou & Ren, Xiao-wen, 2018. "Numerical modeling on pumping performance of piccolo-tube multi-nozzles supersonic ejector in an oil radiator passage," Energy, Elsevier, vol. 158(C), pages 216-227.

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