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Numerical investigation of the flow structures inside mixing section of the ejector

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  • Metin, Cagri
  • Gök, Okan
  • Atmaca, Ayşe Uğurcan
  • Erek, Aytunç

Abstract

In this study, the effect of the position of the primary nozzle and the converging angle of the mixing section is investigated numerically for a vapor jet ejector to be used in a heat-driven ejector refrigeration cycle. Entrainment ratio is reported as one of the global performance parameters which is affected sensitively by the nozzle position and converging angle of the mixing section. Furthermore, the effect of the geometric parameters is also explained using Mach number distributions throughout the ejector. Mach contours and the shadowgraphs of the ejector as well are displayed comparatively. The influence of the secondary flow effective area is discussed for better comprehension of the ejector performance by means of the aforecited geometrical parameters. The importance of this study is that the results can lead to the design of the mixing chamber of the ejector for the heat-driven ejector refrigeration systems. ANSYS Fluent software package is used for computational fluid dynamics simulations taking real gas thermodynamic properties into account and the numerical model was validated using the experimental data from the literature.

Suggested Citation

  • Metin, Cagri & Gök, Okan & Atmaca, Ayşe Uğurcan & Erek, Aytunç, 2019. "Numerical investigation of the flow structures inside mixing section of the ejector," Energy, Elsevier, vol. 166(C), pages 1216-1228.
    • Handle: RePEc:eee:energy:v:166:y:2019:i:c:p:1216-1228
    DOI: 10.1016/j.energy.2018.10.095
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    References listed on IDEAS

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    1. Besagni, Giorgio & Mereu, Riccardo & Inzoli, Fabio, 2016. "Ejector refrigeration: A comprehensive review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 53(C), pages 373-407.
    2. Chen, Jianyong & Jarall, Sad & Havtun, Hans & Palm, Björn, 2015. "A review on versatile ejector applications in refrigeration systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 49(C), pages 67-90.
    3. Wang, Chen & Wang, Lei & Wang, Xinli & Zhao, Hongxia, 2017. "Design and numerical investigation of an adaptive nozzle exit position ejector in multi-effect distillation desalination system," Energy, Elsevier, vol. 140(P1), pages 673-681.
    4. 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.
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    Cited by:

    1. Ding, Hongbing & Dong, Yuanyuan & Zhang, Yu & Wen, Chuang & Yang, Yan, 2024. "Exergy performance analysis of hydrogen recirculation ejectors exhibiting phase change behaviour in PEMFC applications," Energy, Elsevier, vol. 300(C).
    2. Li, Xiaoqiong & Wang, Xiaoyan & Zhang, Yufeng & Fang, Lei & Deng, Na & Zhang, Yan & Jin, Zhendong & Yu, Xiaohui & Yao, Sheng, 2020. "Experimental and economic analysis with a novel ejector-based detection system for thermodynamic measurement of compressors," Applied Energy, Elsevier, vol. 261(C).
    3. 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).
    4. Jianmei Feng & Jiquan Han & Zihui Pang & Xueyuan Peng, 2023. "Designing Hydrogen Recirculation Ejectors for Proton Exchange Membrane Fuel Cell Systems," Energies, MDPI, vol. 16(3), pages 1-10, January.
    5. Zhang, Jingzhi & Zhai, Xiaoyu & Li, Shizhen, 2020. "Numerical studies on the performance of ammonia ejectors used in ocean thermal energy conversion system," Renewable Energy, Elsevier, vol. 161(C), pages 766-776.
    6. Lixing Zheng & Hongwei Hu & Weibo Wang & Yiyan Zhang & Lingmei Wang, 2022. "Study on Flow Distribution and Structure Optimization in a Mix Chamber and Diffuser of a CO 2 Two-Phase Ejector," Mathematics, MDPI, vol. 10(5), pages 1-16, February.
    7. Besagni, Giorgio, 2019. "Ejectors on the cutting edge: The past, the present and the perspective," Energy, Elsevier, vol. 170(C), pages 998-1003.

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