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<p>The Very Long Chord Slat (VLCS) has emerged as a promising high-lift device configuration for commercial jetliners. This study focuses on the parametric shape design of two-dimensional high-lift devices incorporating VLCS, with particular emphasis on slat contour and position modifications. A surrogate-based optimization (SBO) framework, integrating Kriging metamodeling and the Non-dominated Sorting Genetic Algorithm, was employed to enhance the lift and drag performance at targeted angles of attack (AOA). The results reveal distinct Pareto fronts, demonstrating that a 25% slat chord extension yields a 7% improvement in lift-drag ratio at take-off AOA and a 4% increase in lift coefficient at landing AOA. The study also underscores the efficacy of the SBO method in preliminary aerodynamic design exploration for high-lift devices.</p>

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Surrogate-based aerodynamic shape design of a multi-element airfoil with a VLCS leading-edge

  • 期刊论文

  • 发表日期：

    2025年5月13日

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  • Yifeng Liao,
  • Guoyu Zheng,
  • Weipeng Li

摘要

The Very Long Chord Slat (VLCS) has emerged as a promising high-lift device configuration for commercial jetliners. This study focuses on the parametric shape design of two-dimensional high-lift devices incorporating VLCS, with particular emphasis on slat contour and position modifications. A surrogate-based optimization (SBO) framework, integrating Kriging metamodeling and the Non-dominated Sorting Genetic Algorithm, was employed to enhance the lift and drag performance at targeted angles of attack (AOA). The results reveal distinct Pareto fronts, demonstrating that a 25% slat chord extension yields a 7% improvement in lift-drag ratio at take-off AOA and a 4% increase in lift coefficient at landing AOA. The study also underscores the efficacy of the SBO method in preliminary aerodynamic design exploration for high-lift devices.