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Aerodynamic losses for squealer tip with different winglets

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Abstract

Aerodynamic loss measurements and flow visualizations have been conducted for a squealer tip with different winglets. The present results for seven winglets indicate that winglet coverage along the pressure side has a negative effect in the loss reduction, whereas winglet coverage along the suction side has a positive effect. Winglet coverage along both sides performs better than that along the pressure side but worse than that along the suction side. The upstream half of the suction-side winglet plays a crucial role in the loss reduction. Thus, this portion needs to be included in the winglet for better aerodynamic performance. The pressure-side winglet brings additional flow disturbances similar to the ones existing over the plane tip back to the tip gap flow over the squealer tip. For the suction-side winglet, however, the tip gap flow is separated from the casing in a wide range between the leading edge and mid-chord.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Kumoh National Institute of Technology, Gumi, Gyeongbuk, 730-701, Korea

    Yong Cheol Seo & Sang Woo Lee

Authors
  1. Yong Cheol Seo
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  2. Sang Woo Lee
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Corresponding author

Correspondence to Sang Woo Lee.

Additional information

Recommended by Associate Editor Sangyoup Lee

Yong Cheol Seo received his B.S. and M.S. degrees in Mechanical Engineering from Kumoh National Institute of Technology. He currently works for Korea Railroad Research Institute.

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Seo, Y.C., Lee, S.W. Aerodynamic losses for squealer tip with different winglets. J Mech Sci Technol 33, 639–647 (2019). https://doi.org/10.1007/s12206-019-0119-2

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  • DOI: https://doi.org/10.1007/s12206-019-0119-2

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