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Wing fairing variations may improve aerodynamic performance by allowing airflow streamlines to meet gradually, reducing interference drag. However, the addition of wing fairings may instead increase skin friction drag as well as form drag. This study investigates the influence of wing fairings towards the total drag of a UAV. Two test models based on Aksantara ITB’s LELA and RP Teams’ existing UAV designs are analyzed in this research. A total of four variations were made, with one having no wing fairing and the remaining having symmetrical fillets with varying radii. These models were analyzed using Computational Fluid Dynamics, employing the Reynolds Averaged Navier-Stokes method with the SST k-ω turbulence model. The angle of attack varies from −4 to 20° with flow velocity set as 12 m/s for the LELA derived models and 68 m/s for the RP derived models. Results show that the addition of wing fairings may reduce drag generation. However, certain wing fairing sizes increase drag, instead, due to form drag. This suggests that there is an optimal fillet size that reduces interference drag without increasing too much form drag.

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Study of Wing Fairing Effects on the Drag Coefficient of a Low Subsonic UAV

  • 会议论文

  • 发表日期：

    2025年

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  • Nathan Valencio Hu,
  • Eugene Timothy Clay,
  • Solahudin Al Ayubbi,
  • Nicholas Patrick,
  • Muhamad Novian Akbar,
  • Ema Amalia

摘要

Wing fairing variations may improve aerodynamic performance by allowing airflow streamlines to meet gradually, reducing interference drag. However, the addition of wing fairings may instead increase skin friction drag as well as form drag. This study investigates the influence of wing fairings towards the total drag of a UAV. Two test models based on Aksantara ITB’s LELA and RP Teams’ existing UAV designs are analyzed in this research. A total of four variations were made, with one having no wing fairing and the remaining having symmetrical fillets with varying radii. These models were analyzed using Computational Fluid Dynamics, employing the Reynolds Averaged Navier-Stokes method with the SST k-ω turbulence model. The angle of attack varies from −4 to 20° with flow velocity set as 12 m/s for the LELA derived models and 68 m/s for the RP derived models. Results show that the addition of wing fairings may reduce drag generation. However, certain wing fairing sizes increase drag, instead, due to form drag. This suggests that there is an optimal fillet size that reduces interference drag without increasing too much form drag.