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Experimental and numerical analysis of supersonic air ejector

Author

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  • Chong, Daotong
  • Hu, Mengqi
  • Chen, Weixiong
  • Wang, Jinshi
  • Liu, Jiping
  • Yan, Junjie

Abstract

The present paper performs experimental and numerical investigations on the global performance and internal flow of a supersonic air ejector. The effects of operation parameters and geometrical factor on the air ejector performance have been analyzed. The results show that: the static wall pressure and axisymmetric line static pressure remain constant in critical mode under different discharged pressures, but they both increase in sub-critical mode with the increase of the discharged pressure. The shock position of the mixed fluid moves upstream in critical mode. The second shock position disappears in sub-critical mode. The experimental and numerical results indicate that there exists an optimal nozzle exit position (NXP) corresponding to maximum entrainment ratio, but the critical value of discharged pressure is almost independent of NXP.

Suggested Citation

  • Chong, Daotong & Hu, Mengqi & Chen, Weixiong & Wang, Jinshi & Liu, Jiping & Yan, Junjie, 2014. "Experimental and numerical analysis of supersonic air ejector," Applied Energy, Elsevier, vol. 130(C), pages 679-684.
    • Handle: RePEc:eee:appene:v:130:y:2014:i:c:p:679-684
    DOI: 10.1016/j.apenergy.2014.02.023
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    5. Strušnik, Dušan & Marčič, Milan & Golob, Marjan & Hribernik, Aleš & Živić, Marija & Avsec, Jurij, 2016. "Energy efficiency analysis of steam ejector and electric vacuum pump for a turbine condenser air extraction system based on supervised machine learning modelling," Applied Energy, Elsevier, vol. 173(C), pages 386-405.
    6. Tang, Yongzhi & Yuan, Jiali & Liu, Zhongliang & Feng, Qing & Gong, Xiaolong & Lu, Lin & Chua, Kian Jon, 2022. "Study on evolution laws of two-phase choking flow and entrainment performance of steam ejector oriented towards MED-TVC desalination system," Energy, Elsevier, vol. 242(C).
    7. Chen, Hongjie & Zhu, Jiahua & Ge, Jing & Lu, Wei & Zheng, Lixing, 2020. "A cylindrical mixing chamber ejector analysis model to predict the optimal nozzle exit position," Energy, Elsevier, vol. 208(C).
    8. Wu, Yifei & Zhao, Hongxia & Zhang, Cunquan & Wang, Lei & Han, Jitian, 2018. "Optimization analysis of structure parameters of steam ejector based on CFD and orthogonal test," Energy, Elsevier, vol. 151(C), pages 79-93.
    9. Yiqiao Li & Shengqiang Shen & Chao Niu & Yali Guo & Liuyang Zhang, 2022. "The Effect of Different Pressure Conditions on Shock Waves in a Supersonic Steam Ejector," Energies, MDPI, vol. 15(8), pages 1-15, April.
    10. 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.
    11. Li, Fenglei & Wu, Changzhi & Wang, Xiangyu & Tian, Qi & Teo, Kok Lay, 2016. "Sparsity-enhanced optimization for ejector performance prediction," Energy, Elsevier, vol. 113(C), pages 25-34.
    12. Song, Yajie & Wang, Xinli & Wang, Lei & Pan, Fengwen & Chen, Wenmiao & Xi, Fuqiang, 2021. "A twin-nozzle ejector for hydrogen recirculation in wide power operation of polymer electrolyte membrane fuel cell system," Applied Energy, Elsevier, vol. 300(C).
    13. Cai, Zun & Zhu, Jiajian & Sun, Mingbo & Wang, Zhenguo & Bai, Xue-Song, 2018. "Ignition processes and modes excited by laser-induced plasma in a cavity-based supersonic combustor," Applied Energy, Elsevier, vol. 228(C), pages 1777-1782.
    14. Tashtoush, Bourhan M. & Al-Nimr, Moh'd A. & Khasawneh, Mohammad A., 2019. "A comprehensive review of ejector design, performance, and applications," Applied Energy, Elsevier, vol. 240(C), pages 138-172.
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