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Experimental and numerical investigation of transient phenomena in vacuum ejectors

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  • Jafarian, Ali
  • Azizi, Mohammad
  • Forghani, Pezhman

Abstract

In the present work the transient behavior of ejectors is explored experimentally and numerically. The main goal is to achieve an appropriate numerical model for predicting transient phenomena in ejectors. To validate the numerical results, an experimental test rig was built up and a set of experiments was performed. Results showed a good agreement between experiments and numerical simulations and the average deviation of about 16 percent was achieved. Furthermore, employing the validated numerical model a vacuum steam ejector was simulated numerically. Two different linear motive flow pressure profiles were applied to simulate the ejector performance. Results showed that as the slope of the motive flow pressure profile increases as much as twice, the maximum flow rate of suction increases by 40% and the corresponding incidence time decreases.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:energy:v:102:y:2016:i:c:p:528-536
    DOI: 10.1016/j.energy.2016.02.101
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    References listed on IDEAS

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    Cited by:

    1. Llorenç Macia & Robert Castilla & Pedro Javier Gamez-Montero & Gustavo Raush, 2022. "Multi-Factor Design for a Vacuum Ejector Improvement by In-Depth Analysis of Construction Parameters," Sustainability, MDPI, vol. 14(16), pages 1-16, August.
    2. 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.
    3. 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).
    4. Wang, Jiong & Xu, Shuangjie & Cheng, Huaiyu & Ji, Bin & Zhang, Junqiang & Long, Xinping, 2018. "Experimental investigation of cavity length pulsation characteristics of jet pumps during limited operation stage," Energy, Elsevier, vol. 163(C), pages 61-73.
    5. Ll Macia & R. Castilla & P. J. Gamez-Montero & S. Camacho & E. Codina, 2019. "Numerical Simulation of a Supersonic Ejector for Vacuum Generation with Explicit and Implicit Solver in Openfoam," Energies, MDPI, vol. 12(18), pages 1-17, September.
    6. 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.
    7. Zhang, Shaozhi & Luo, Jielin & Wang, Qin & Chen, Guangming, 2018. "Step utilization of energy with ejector in a heat driven freeze drying system," Energy, Elsevier, vol. 164(C), pages 734-744.

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