IDEAS home Printed from https://ideas.repec.org/a/eee/energy/v203y2020ics0360544220309865.html
   My bibliography  Save this article

Numerical model and analysis of heat transfer during microjets array impingement

Author

Listed:
  • Łapka, Piotr
  • Ciepliński, Adrian
  • Rusowicz, Artur

Abstract

In this paper heat and fluid flow characteristics during impingement of an array of microjets was numerically investigated. The numerical model which was based on the compressible steady-state Navier-Stokes equations and SST k-ω turbulence model was developed. Then an array of 8 × 8 microjets which impinged on a hot surface was analyzed. The influence of both a ratio of a distance between a nozzle and hot plate (H/d) as well as a microjet diameter-based Reynolds number (Red) on both the local and average temperature and heat transfer coefficient (HTC) on the surface of the hot plate were numerically studied. During simulations the ratio of the distance between the nozzle and hot plate to the microjet diameter was H/d = 3.125, 25 and 50, while the microjet diameter-based Reynolds number was equal to Red = 690, 1100 and 1510. It was found that the H/d ratio and Red significantly influenced flow patterns in the gap between the nozzle and hot plate as well as the temperature and HTC on the surface of the hot plate. With increase of the H/d ratio a more uniform distributions of the plate temperature and HTC were observed. Moreover, differences between extreme values of these parameters decreased. The optimal ratio of the distance between the nozzle and hot plate to the microjet diameter was calculated to be H/d = 25. Increasing or decreasing of this ratio resulted in the higher average temperatures and lower average values of the HTC on the hot plate. For the small value of the H/d ratio (i.e., H/d = 3.125) the influence of the microjet flow on adjacent microjets was vestigial. The area of the hot plate which was influenced by impinging microjets was small and degradation of the microjet velocity profile was negligible, i.e., high-speed microjets impinged the plate. Air from the microjet flowed above the hot plate and left the zone through spaces between adjacent microjets. For higher values of the H/d ratio influence of the microjet flow on adjacent microjets was observed. The microjet left the nozzle and greatly expanded, while its velocity profile was degraded. The area of the hot plate which was influenced by impinging microjets was large and the microjet velocity was low. Due to significant enlargement of the size of the microjet, it interacted with adjacent microjets, which resulted in the lost of their axisymmetric shape. Moreover, air from the microjet flowed above the hot plate and affected adjacent microjets. The rise in the Red intensified mentioned effects as well as heat transfer intensity on the hot plate. Moreover, the increase of the Red resulted in the decrease of the average temperature of the heater surface as well as the increase of the average HTC regardless the height of the microjet. Calculated average hot plate temperatures were also compered with experimentally measured temperatures and the good matching was found. However, much slower degradation of microjet profiles was observed in experiments than predicted numerically.

Suggested Citation

  • Łapka, Piotr & Ciepliński, Adrian & Rusowicz, Artur, 2020. "Numerical model and analysis of heat transfer during microjets array impingement," Energy, Elsevier, vol. 203(C).
    • Handle: RePEc:eee:energy:v:203:y:2020:i:c:s0360544220309865
    DOI: 10.1016/j.energy.2020.117879
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0360544220309865
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.energy.2020.117879?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. Chauhan, Ranchan & Singh, Tej & Tiwari, Avinash & Patnaik, Amar & Thakur, N.S., 2017. "Hybrid entropy – TOPSIS approach for energy performance prioritization in a rectangular channel employing impinging air jets," Energy, Elsevier, vol. 134(C), pages 360-368.
    2. Khummongkol, D. & Khummongkol, P., 1998. "Heat transfer between an impinging air jet and an impinged water surface," Energy, Elsevier, vol. 23(3), pages 239-245.
    3. Zheng, Wandong & Li, Bojia & Zhang, Huan & You, Shijun & Li, Ying & Ye, Tianzhen, 2016. "Thermal characteristics of a glazed transpired solar collector with perforating corrugated plate in cold regions," Energy, Elsevier, vol. 109(C), pages 781-790.
    4. Chauhan, Ranchan & Thakur, N.S., 2014. "Investigation of the thermohydraulic performance of impinging jet solar air heater," Energy, Elsevier, vol. 68(C), pages 255-261.
    5. Kim, Kyung Min & Moon, Hokyu & Park, Jun Su & Cho, Hyung Hee, 2014. "Optimal design of impinging jets in an impingement/effusion cooling system," Energy, Elsevier, vol. 66(C), pages 839-848.
    6. Di Marco, Paolo & Frigo, Stefano & Gabbrielli, Roberto & Pecchia, Stefano, 2016. "Mathematical modelling and energy performance assessment of air impingement drying systems for the production of tissue paper," Energy, Elsevier, vol. 114(C), pages 201-213.
    7. Alamir, M. & Witrant, E. & Della Valle, G. & Rouaud, O. & Josset, Ch. & Boillereaux, L., 2013. "Estimation of energy saving thanks to a reduced-model-based approach: Example of bread baking by jet impingement," Energy, Elsevier, vol. 53(C), pages 74-82.
    Full references (including those not matched with items on IDEAS)

    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. Wandong Zheng & Huan Zhang & Shijun You & Yindan Fu, 2017. "Experimental Investigation of the Transpired Solar Air Collectors and Metal Corrugated Packing Solar Air Collectors," Energies, MDPI, vol. 10(3), pages 1-12, March.
    2. Chauhan, Ranchan & Singh, Tej & Thakur, N.S. & Kumar, Nitin & Kumar, Raj & Kumar, Anil, 2018. "Heat transfer augmentation in solar thermal collectors using impinging air jets: A comprehensive review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 82(P3), pages 3179-3190.
    3. Chaurasiya, Shailendra Kumar & Singh, Satyender, 2023. "High thermal performance of the solar air heater designs triggered by improved jet stability," Renewable Energy, Elsevier, vol. 204(C), pages 532-545.
    4. Chauhan, Ranchan & Kim, Sung Chul, 2019. "Effective efficiency distribution characteristics in protruded/dimpled-arc plate solar thermal collector," Renewable Energy, Elsevier, vol. 138(C), pages 955-963.
    5. Chen, Xiaobin & Man, Yi & Zheng, Qifu & Hu, Yusha & Li, Jigeng & Hong, Mengna, 2019. "Industrial verification of energy saving for the single-tier cylinder based paper drying process," Energy, Elsevier, vol. 170(C), pages 261-272.
    6. Peng Guan & Yan-Ting Ai & Cheng-Wei Fei, 2019. "An Enhanced Flow-Thermo-Structural Modeling and Validation for the Integrated Analysis of a Film Cooling Nozzle Guide Vane," Energies, MDPI, vol. 12(14), pages 1-20, July.
    7. Maithani, Rajesh & Sharma, Sachin & Kumar, Anil, 2021. "Thermo-hydraulic and exergy analysis of inclined impinging jets on absorber plate of solar air heater," Renewable Energy, Elsevier, vol. 179(C), pages 84-95.
    8. Zheng-Xin Wang & Dan-Dan Li & Hong-Hao Zheng, 2018. "The External Performance Appraisal of China Energy Regulation: An Empirical Study Using a TOPSIS Method Based on Entropy Weight and Mahalanobis Distance," IJERPH, MDPI, vol. 15(2), pages 1-18, January.
    9. Lioua Kolsi & Fatih Selimefendigil & Kaouther Ghachem & Talal Alqahtani & Salem Algarni, 2022. "Multiple Impinging Jet Cooling of a Wavy Surface by Using Double Porous Fins under Non-Uniform Magnetic Field," Mathematics, MDPI, vol. 10(4), pages 1-20, February.
    10. Afaq Jasim Mahmood, 2020. "Thermal Evaluation of a Double-Pass Unglazed Solar Air Heater with Perforated Plate and Wire Mesh Layers," Sustainability, MDPI, vol. 12(9), pages 1-15, April.
    11. Srivastav, Ayushman & Maithani, Rajesh & Sharma, Sachin, 2024. "Investigation of heat transfer and friction characteristics of solar air heater through an array of submerged impinging jets," Renewable Energy, Elsevier, vol. 227(C).
    12. Chung, Heeyoon & Sohn, Ho-Seong & Park, Jun Su & Kim, Kyung Min & Cho, Hyung Hee, 2017. "Thermo-structural analysis of cracks on gas turbine vane segment having multiple airfoils," Energy, Elsevier, vol. 118(C), pages 1275-1285.
    13. Chauhan, Ranchan & Singh, Tej & Thakur, N.S. & Patnaik, Amar, 2016. "Optimization of parameters in solar thermal collector provided with impinging air jets based upon preference selection index method," Renewable Energy, Elsevier, vol. 99(C), pages 118-126.
    14. Al-damook, Amer & Khalil, Wissam Hashim, 2017. "Experimental evaluation of an unglazed solar air collector for building space heating in Iraq," Renewable Energy, Elsevier, vol. 112(C), pages 498-509.
    15. Ewe, Win Eng & Fudholi, Ahmad & Sopian, Kamaruzzaman & Moshery, Refat & Asim, Nilofar & Nuriana, Wahidin & Ibrahim, Adnan, 2022. "Thermo-electro-hydraulic analysis of jet impingement bifacial photovoltaic thermal (JIBPVT) solar air collector," Energy, Elsevier, vol. 254(PB).
    16. Sciubba, Enrico, 2015. "Air-cooled gas turbine cycles – Part 1: An analytical method for the preliminary assessment of blade cooling flow rates," Energy, Elsevier, vol. 83(C), pages 104-114.
    17. Wang, Dengjia & Gao, Qian & Liu, Yanfeng & Wang, Yingying & Chen, Yaowen & Liu, Yuan & Liu, Jiaping, 2019. "Experimental study on heating characteristics and parameter optimization of transpired solar collectors," Applied Energy, Elsevier, vol. 238(C), pages 534-546.
    18. Ge, Zhaolong & Zhang, Hongwei & Zhou, Zhe & Cao, Shirong & Zhang, Di & Liu, Xiangjie & Tian, Chao, 2023. "Experimental study on the characteristics and mechanism of high-pressure water jet fracturing in high-temperature hard rocks," Energy, Elsevier, vol. 270(C).
    19. Salman, Mohammad & Chauhan, Ranchan & Kim, Sung Chul, 2021. "Exergy analysis of solar heat collector with air jet impingement on dimple-shape-roughened absorber surface," Renewable Energy, Elsevier, vol. 179(C), pages 918-928.
    20. Zheng, Wandong & Zhang, Huan & You, Shijun & Fu, Yindan & Zheng, Xuejing, 2017. "Thermal performance analysis of a metal corrugated packing solar air collector in cold regions," Applied Energy, Elsevier, vol. 203(C), pages 938-947.

    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:eee:energy:v:203:y:2020:i:c:s0360544220309865. 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: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/energy .

    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.