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The primary pseudo-shock pattern of steam ejector and its influence on pumping efficiency based on CFD approach

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  • Wang, Xiaodong
  • Dong, Jingliang
  • Zhang, Guangli
  • Fu, Qiang
  • Li, He
  • Han, Yu
  • Tu, Jiyuan

Abstract

The patterns of primary flow jet core in steam ejector were investigated using computational fluid dynamics (CFD) method. Simulations based on ideal gas model at different operating conditions were performed. The results demonstrate the pattern of primary pseudo-shock flow was affected by the operating conditions obviously when value of operating condition was bigger than that of the critical condition. Compared with the results generated from ideal gas modelling, the primary pseudo-shock flow predicted by wet steam model has a similar pattern and almost the same effective area. But the wet steam model based simulation gives a further downstream choking position and a higher secondary fluid flow velocity at choking position. The above two factors lead to improved entrainment ratio (Em) and increased critical back pressure of steam ejector compared to the results generated from ideal gas modelling. More importantly, the wet steam model predictions show better agreement with the experimental data.

Suggested Citation

  • Wang, Xiaodong & Dong, Jingliang & Zhang, Guangli & Fu, Qiang & Li, He & Han, Yu & Tu, Jiyuan, 2019. "The primary pseudo-shock pattern of steam ejector and its influence on pumping efficiency based on CFD approach," Energy, Elsevier, vol. 167(C), pages 224-234.
    • Handle: RePEc:eee:energy:v:167:y:2019:i:c:p:224-234
    DOI: 10.1016/j.energy.2018.10.097
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    References listed on IDEAS

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    1. Wang, Xiaodong & Dong, Jingliang & Li, Ao & Lei, Hongjian & Tu, Jiyuan, 2014. "Numerical study of primary steam superheating effects on steam ejector flow and its pumping performance," Energy, Elsevier, vol. 78(C), pages 205-211.
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    Cited by:

    1. Yang, Yan & Zhu, Xiaowei & Yan, Yuying & Ding, Hongbing & Wen, Chuang, 2019. "Performance of supersonic steam ejectors considering the nonequilibrium condensation phenomenon for efficient energy utilisation," Applied Energy, Elsevier, vol. 242(C), pages 157-167.
    2. 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.
    3. Zhang, Guojie & Dykas, Sławomir & Li, Pan & Li, Hang & Wang, Junlei, 2020. "Accurate condensing steam flow modeling in the ejector of the solar-driven refrigeration system," Energy, Elsevier, vol. 212(C).
    4. Besagni, Giorgio, 2019. "Ejectors on the cutting edge: The past, the present and the perspective," Energy, Elsevier, vol. 170(C), pages 998-1003.
    5. 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.
    6. Dolatabadi, Amir Momeni & Lakzian, Esmail & Heydari, Mahdi & Khan, Afrasyab, 2022. "A modified model of the suction technique of wetness reducing in wet steam flow considering power-saving," Energy, Elsevier, vol. 238(PA).

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