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<p>Results of experimental and computational investigations on the delay of a laminar-turbulent transition in the boundary layer of a swept wing by 15% by the sweeping surface relief method, namely, with the use of twodimensional surface reliefs of different heights in the form of strips of rectangular cross section, oriented parallel or at an angle to the leading edge of the wing and positioned at different distances from it, are presented. A calculation method of determining the efficiency of the laminarization of a flow with the use of such two-dimensional surface reliefs that decrease the instability of the corresponding transverse flow was proposed and calibrated on the basis of experimental data. By comparison with experimental data, the possibility of this method for exact prediction of the effectiveness of delaying the formation of a laminar-turbulent transition is demonstrated. A prediction of the effectiveness of the surface relief configurations that were not previously studied in experiments has been performed.</p>

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Prediction of the Laminarization of a Swept Wing by Structuring Its Surface Relief: Experiment and Calculation

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • A. V. Boiko,
  • V. I. Borodulin,
  • A. V. Ivanov,
  • S. V. Kirilovskiy,
  • D. A. Mischenko,
  • T. V. Poplavskaya,
  • A. D. Cherepanov

摘要

Results of experimental and computational investigations on the delay of a laminar-turbulent transition in the boundary layer of a swept wing by 15% by the sweeping surface relief method, namely, with the use of twodimensional surface reliefs of different heights in the form of strips of rectangular cross section, oriented parallel or at an angle to the leading edge of the wing and positioned at different distances from it, are presented. A calculation method of determining the efficiency of the laminarization of a flow with the use of such two-dimensional surface reliefs that decrease the instability of the corresponding transverse flow was proposed and calibrated on the basis of experimental data. By comparison with experimental data, the possibility of this method for exact prediction of the effectiveness of delaying the formation of a laminar-turbulent transition is demonstrated. A prediction of the effectiveness of the surface relief configurations that were not previously studied in experiments has been performed.