IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v12y2019i18p3553-d267920.html
   My bibliography  Save this article

Numerical Simulation of a Supersonic Ejector for Vacuum Generation with Explicit and Implicit Solver in Openfoam

Author

Listed:
  • Ll Macia

    (AR Vacuum, Sant Joan Despí, ES-08970 Catalunya, Spain)

  • R. Castilla

    (LABSON—Department of Fluid Mechanics, Universitat Politecnica de Catalunya, Terrassa, ES-08222 Catalunya, Spain)

  • P. J. Gamez-Montero

    (LABSON—Department of Fluid Mechanics, Universitat Politecnica de Catalunya, Terrassa, ES-08222 Catalunya, Spain)

  • S. Camacho

    (AR Vacuum, Sant Joan Despí, ES-08970 Catalunya, Spain)

  • E. Codina

    (LABSON—Department of Fluid Mechanics, Universitat Politecnica de Catalunya, Terrassa, ES-08222 Catalunya, Spain)

Abstract

Supersonic ejectors are used extensively in all kind of applications: compression of refrigerants in cooling systems, pumping of volatile fluids or in vacuum generation. In vacuum generation, also known as zero-secondary flow, the ejector has a transient behaviour. In this paper, a numerical and experimental research of a supersonic compressible air nozzle is performed in order to investigate and to simulate its behaviour. The CFD toolbox OpenFOAM 6 was used, with two density-based solvers: explicit solver rhoCentralFoam, which implements Kurganov Central-upwind schemes, and implicit solver HiSA, which implements the AUSM+up upwind scheme. The behaviour of the transient evacuation ranges between adiabatic polytropic exponent at the beginning of the process and isothermal at the end. A model for the computation of the transient polytropic exponent is proposed. During the evacuation, two regimes are encountered in the second nozzle. In the supercritic regime, the secondary is choked and sonic flow is reached. In the subcritic regime, the secondary flow is subsonic. The final agreement is good with the two different solvers, although simulation tends to slightly overestimate flow rate for large values region.

Suggested Citation

  • 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.
  • Handle: RePEc:gam:jeners:v:12:y:2019:i:18:p:3553-:d:267920
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/12/18/3553/pdf
    Download Restriction: no

    File URL: https://www.mdpi.com/1996-1073/12/18/3553/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Kumar, Vikas & Sachdeva, Gulshan, 2018. "1-D model for finding geometry of a single phase ejector," Energy, Elsevier, vol. 165(PA), pages 75-92.
    2. Sierra-Pallares, José & García del Valle, Javier & Paniagua, Jorge Muñoz & García, Javier & Méndez-Bueno, César & Castro, Francisco, 2018. "Shape optimization of a long-tapered R134a ejector mixing chamber," Energy, Elsevier, vol. 165(PA), pages 422-438.
    3. 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.
    4. Chen, Weixiong & Shi, Chaoyin & Zhang, Shuangping & Chen, Huiqiang & Chong, Daotong & Yan, Junjie, 2017. "Theoretical analysis of ejector refrigeration system performance under overall modes," Applied Energy, Elsevier, vol. 185(P2), pages 2074-2084.
    5. Lamberts, Olivier & Chatelain, Philippe & Bourgeois, Nicolas & Bartosiewicz, Yann, 2018. "The compound-choking theory as an explanation of the entrainment limitation in supersonic ejectors," Energy, Elsevier, vol. 158(C), pages 524-536.
    6. Petrovic, Andrija & Jovanovic, Milos Z. & Genic, Srbislav & Bugaric, Ugljesa & Delibasic, Boris, 2018. "Evaluating performances of 1-D models to predict variable area supersonic gas ejector performances," Energy, Elsevier, vol. 163(C), pages 270-289.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    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. Yongseok Jeon & Hoon Kim & Jae Hwan Ahn & Sanghoon Kim, 2020. "Effects of Nozzle Exit Position on Condenser Outlet Split Ejector-Based R600a Household Refrigeration Cycle," Energies, MDPI, vol. 13(19), pages 1-12, October.

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Besagni, Giorgio, 2019. "Ejectors on the cutting edge: The past, the present and the perspective," Energy, Elsevier, vol. 170(C), pages 998-1003.
    2. Wang, Kai & Wang, Lei & Gao, Rui, 2023. "An extended mechanism model of gaseous ejectors," Energy, Elsevier, vol. 264(C).
    3. Croquer, Sergio & Fang, Yu & Metsue, Antoine & Bartosiewicz, Yann & Poncet, Sébastien, 2021. "Compound-choking theory for supersonic ejectors working with real gas," Energy, Elsevier, vol. 227(C).
    4. Metsue, Antoine & Debroeyer, Romain & Poncet, Sébastien & Bartosiewicz, Yann, 2022. "An improved thermodynamic model for supersonic real-gas ejectors using the compound-choking theory," Energy, Elsevier, vol. 238(PB).
    5. Zhou, Yifan & Chen, Guangming & Hao, Xinyue & Gao, Neng & Volovyk, Oleksii, 2023. "Working mechanism and characteristics analysis of a novel configuration of a supersonic ejector," Energy, Elsevier, vol. 278(PB).
    6. 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.
    7. Van den Berghe, Jan & Dias, Bruno R.B. & Bartosiewicz, Yann & Mendez, Miguel A., 2023. "A 1D model for the unsteady gas dynamics of ejectors," Energy, Elsevier, vol. 267(C).
    8. Du, Yang & Dai, Yiping, 2018. "Off-design performance analysis of a power-cooling cogeneration system combining a Kalina cycle with an ejector refrigeration cycle," Energy, Elsevier, vol. 161(C), pages 233-250.
    9. Bi, Rongshan & Chen, Chen & Li, Jiansong & Tan, Xinshun & Xiang, Shuguang, 2018. "Research on the CFD numerical simulation of flash boiling atomization," Energy, Elsevier, vol. 165(PA), pages 768-781.
    10. Tashtoush, Bourhan M. & Al-Nimr, Moh'd A. & Khasawneh, Mohammad A., 2017. "Investigation of the use of nano-refrigerants to enhance the performance of an ejector refrigeration system," Applied Energy, Elsevier, vol. 206(C), pages 1446-1463.
    11. 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.
    12. 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.
    13. Zhang, Youjun & Xiong, Nian & Ge, Zhihua & Zhang, Yichen & Hao, Junhong & Yang, Zhiping, 2020. "A novel cascade heating system for waste heat recovery in the combined heat and power plant integrating with the steam jet pump," Applied Energy, Elsevier, vol. 278(C).
    14. 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).
    15. Jeon, Yongseok & Kim, Sunjae & Kim, Dongwoo & Chung, Hyun Joon & Kim, Yongchan, 2017. "Performance characteristics of an R600a household refrigeration cycle with a modified two-phase ejector for various ejector geometries and operating conditions," Applied Energy, Elsevier, vol. 205(C), pages 1059-1067.
    16. Najjaran, Ahmad & Freeman, James & Ramos, Alba & Markides, Christos N., 2019. "Experimental investigation of an ammonia-water-hydrogen diffusion absorption refrigerator," Applied Energy, Elsevier, vol. 256(C).
    17. 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.
    18. Jeon, Yongseok & Kim, Sunjae & Lee, Sang Hun & Chung, Hyun Joon & Kim, Yongchan, 2020. "Seasonal energy performance characteristics of novel ejector-expansion air conditioners with low-GWP refrigerants," Applied Energy, Elsevier, vol. 278(C).
    19. Anas F A Elbarghthi & Saleh Mohamed & Van Vu Nguyen & Vaclav Dvorak, 2020. "CFD Based Design for Ejector Cooling System Using HFOS (1234ze(E) and 1234yf)," Energies, MDPI, vol. 13(6), pages 1-19, March.
    20. Valerie Eveloy & Yusra Alkendi, 2021. "Thermodynamic Performance Investigation of a Small-Scale Solar Compression-Assisted Multi-Ejector Indoor Air Conditioning System for Hot Climate Conditions," Energies, MDPI, vol. 14(14), pages 1-31, July.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jeners:v:12:y:2019:i:18:p:3553-:d:267920. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.