IDEAS home Printed from https://ideas.repec.org/a/eee/energy/v260y2022ics0360544222020473.html
   My bibliography  Save this article

An efficient winglet coverage for aeroengine turbine blade flat tip and its loss map

Author

Listed:
  • Jeong, Jae Sung
  • Bong, Seon Woo
  • Lee, Sang Woo

Abstract

The stage efficiency of an axial-flow turbine is influenced considerably by the leakage loss over its blade tip. The objective of this experimental study is (i) to find the best winglet coverage for the blade flat tip in an aeroengine turbine cascade of strong reaction and (ii) to know its full aerodynamic performance. In order to do this, aerodynamic losses for seven different winglets of new streamlined design are measured and then the loss map for the best winglet is completed with the variations of h/s (tip gap-to-span ratio) and w/p (winglet width-to-pitch ratio) for the first time, by employing five-hole probe measurement system. The result shows that double-sided winglets lead to lower loss than single-sided ones and the double-sided winglet covering pressure-side and upstream suction-side is found to be the best one. The loss map for the best winglet reveals that higher h/s leads to higher loss for any w/p, and higher w/p results in lower loss for any h/s. With increasing h/s, the loss reduction by the best winglet of w/p = 5.0% becomes more considerable and is closer to that by the one of w/p = 10.0%. Regardless of h/s, the present best winglet tip has lower loss than the full squealer tip that is widely employed in modern gas turbines.

Suggested Citation

  • Jeong, Jae Sung & Bong, Seon Woo & Lee, Sang Woo, 2022. "An efficient winglet coverage for aeroengine turbine blade flat tip and its loss map," Energy, Elsevier, vol. 260(C).
    • Handle: RePEc:eee:energy:v:260:y:2022:i:c:s0360544222020473
    DOI: 10.1016/j.energy.2022.125153
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0360544222020473
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.energy.2022.125153?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. Gao, Jie & Zheng, Qun & Xu, Tianbang & Dong, Ping, 2015. "Inlet conditions effect on tip leakage vortex breakdown in unshrouded axial turbines," Energy, Elsevier, vol. 91(C), pages 255-263.
    2. Jeong, Jae Sung & Lee, Sang Woo, 2020. "Full aerodynamic loss data for efficient squealer tip design in an axial flow turbine," Energy, Elsevier, vol. 206(C).
    3. Nakhchi, M.E. & Naung, S. Win & Rahmati, M., 2021. "High-resolution direct numerical simulations of flow structure and aerodynamic performance of wind turbine airfoil at wide range of Reynolds numbers," Energy, Elsevier, vol. 225(C).
    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. Zhou, Kai & Zheng, Xinqian, 2022. "Novel wave-shaped tip-shroud contours towards reducing turbine leakage loss," Energy, Elsevier, vol. 254(PA).
    2. Rocha, P. A. Costa & Rocha, H. H. Barbosa & Carneiro, F. O. Moura & da Silva, M. E. Vieira & de Andrade, C. Freitas, 2016. "A case study on the calibration of the k–ω SST (shear stress transport) turbulence model for small scale wind turbines designed with cambered and symmetrical airfoils," Energy, Elsevier, vol. 97(C), pages 144-150.
    3. Win Naung, Shine & Nakhchi, Mahdi Erfanian & Rahmati, Mohammad, 2021. "High-fidelity CFD simulations of two wind turbines in arrays using nonlinear frequency domain solution method," Renewable Energy, Elsevier, vol. 174(C), pages 984-1005.
    4. Jeong, Jae Sung & Lee, Sang Woo, 2020. "Full aerodynamic loss data for efficient squealer tip design in an axial flow turbine," Energy, Elsevier, vol. 206(C).
    5. Qi, Yingxia & Meng, Xiangqi & Mu, Defu & Sun, Yangliu & Zhang, Hua, 2016. "Study on mechanism and factors affecting the gas leakage through clearance seal at nano-level by molecular dynamics method," Energy, Elsevier, vol. 102(C), pages 252-259.
    6. Shuai, Jiang & Jianyang, Yu & Hongwu, Wang & Fu, Chen & Shaowen, Chen & Yanping, Song, 2020. "Experimental investigation of the bending clearance on the aerodynamic performance in turbine blade tip region," Energy, Elsevier, vol. 197(C).
    7. Nakhchi, M.E. & Naung, S. Win & Rahmati, M., 2022. "Influence of blade vibrations on aerodynamic performance of axial compressor in gas turbine: Direct numerical simulation," Energy, Elsevier, vol. 242(C).
    8. Mahdi Erfanian Nakhchi & Shine Win Naung & Mohammad Rahmati, 2023. "Direct Numerical Simulations of Turbulent Flow over Low-Pressure Turbine Blades with Aeroelastic Vibrations and Inflow Wakes," Energies, MDPI, vol. 16(6), pages 1-21, March.
    9. Nakhchi, M.E. & Naung, S. Win & Dala, L. & Rahmati, M., 2022. "Direct numerical simulations of aerodynamic performance of wind turbine aerofoil by considering the blades active vibrations," Renewable Energy, Elsevier, vol. 191(C), pages 669-684.

    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:260:y:2022:i:c:s0360544222020473. 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.