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An experimental study on the effect of a novel nature-inspired 3D-serrated leading edge on the aerodynamic performance of a double delta wing in the transitional flow regime

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Abstract

{tiThis study examines the effect of nature-inspired leading edge 3D serration on the aerodynamic performance of a 65/35-degree double delta wing. Force measurement experiments were conducted on a smooth-surface model and a model equipped with various combinations of serrated pieces in the leading edge area. Four symmetric different positions were examined in a low-speed wind tunnel. The transitional flow regime was applied with Reynolds numbers of 2×105 and angles of attack (AOA) of 0 to 36 degrees. Compared to the clean model, there is a notable enhancement in the maximum lift coefficient, especially for the pieces located at the apex and kink angle locations. However, when changing the combination of serrated leading edge (SLE) elements, a decline in CL can be seen at some AOAs, and adding more SLE pieces is not always useful. A drag reduction is also achieved by installing these elements, which provided a higher lif}t-to-drag ratio for all AOAs. Finally, the serrated leading edge postponed the stall angle of the double delta wing.

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Acknowledgments

This work was supported by the Brain Pool Program through the National Research Foundation of Korea (NRF2019H1D3A2A01061428), which is funded by Korean government (MSIT). Partial support was also obtained from the National Research Foundation of Korea (NRF) grant, which is funded by the Korean government (MSIT) (No. 20110030013, No. 2018R1A2B2007117).

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Authors and Affiliations

  1. Department of Mechanical Engineering, Isfahan University of Technology, Isfahan, Iran

    Hamed Khodabakhshian Naeini & Mahdi Nili-Ahmadabadi

  2. School of Mechanical Engineering, Pusan National University, Busan, 46241, Korea

    Kyung Chun Kim

Authors
  1. Hamed Khodabakhshian Naeini
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  2. Mahdi Nili-Ahmadabadi
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  3. Kyung Chun Kim
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Corresponding authors

Correspondence to Mahdi Nili-Ahmadabadi or Kyung Chun Kim.

Additional information

Recommended by Associate Editor Sangyoup Lee

Hamed Khodabakhshian Naeini is a Ph.D. student at the Mechanical Engineering Department, Isfahan University of Technology, Iran. He obtained his Master of Science degree from Amirkabir University of Technology in 2005 in aerospace engineering. His main research interests are experimental aerodynamics, fluid mechanics, PIV measurement, and aerodynamic design.

Mahdi Nili-Ahmadabadi is an Associate Professor and the faculty member of Mechanical Engineering Department at Isfahan University of Technology. He received his master and Ph.D. degrees from Sharif University of Technology in 2005 and 2010, respecttively. His major research interests are inverse design, turbomachinery, experimental aerodynamics, and PIV measurement.

Kyung Chun Kim is a Distinguished Professor at the School of Mechanical Engineering of Pusan National University in Korea. He obtained his Ph.D. from the Korea Advanced Institute of Science and Technology (KAIST), Korea, in 1987. He was selected as a Member of the National Academy of Engineering of Korea in 2004. His research interests include flow measurements based on PIV/LIF, POCT development, wind turbines, and organic Rankine cycle system.

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Naeini, H.K., Nili-Ahmadabadi, M. & Kim, K.C. An experimental study on the effect of a novel nature-inspired 3D-serrated leading edge on the aerodynamic performance of a double delta wing in the transitional flow regime. J Mech Sci Technol 33, 5913–5921 (2019). https://doi.org/10.1007/s12206-019-1136-x

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  • DOI: https://doi.org/10.1007/s12206-019-1136-x

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