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首页> 外文期刊>Aerospace science and technology >Large-eddy simulations of complex aerodynamic flows over multi-element iced airfoils
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Large-eddy simulations of complex aerodynamic flows over multi-element iced airfoils

机译：多元素冰翼型的复杂空气动力学流量的大涡流模拟

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摘要

Large-eddy simulations (LESs) of flows over two types of iced airfoils with three multi-elements are performed to investigate the aerodynamic characteristics and complex interactions between flows generated from slat, main, and flap elements. The two iced airfoils are considered under supercooled large droplet (SLD) and non-SLD conditions. A good agreement of the mean properties between our numerical and previous experimental data demonstrates that our LES method provides an accurate solution of the complex flows around iced airfoils., whereas it is not for unsteady Reynolds-averaged Navier-Stokes (URANS) data that is simulated independently. For the iced airfoils under the SLD and non-SLD conditions, the aerodynamic degradation is found compared to that of a clean airfoil because the separation bubbles (SBs) induced by ice accretion change shear layer (SL) trajectory shed from the slat cusp, leading to a severe reduction in mass flow. Furthermore, we show that the flow interactions near the slat gap play a crucial role in determining the flow characteristics on main and flap elements (e.g., flow separation). Although strong flow interactions are observed for the non-SLD case because of the presence of upwind horn-shaped ice, the smaller gap distance of the SLD case leads to a larger lift loss. The unsteady features of SBs on the upper surfaces of the slat and main elements under the non-SLD condition are characterized by the power spectral density (PSD) of the pressure fluctuations with multiple peaks at low and high frequencies. (C) 2020 Elsevier Masson SAS. All rights reserved.
机译：进行两种类型的冰翼型的大涡流模拟（较少），进行三种多元素的冰翼型，以研究从板块，主和翼片元件产生的流动之间的空气动力学特性和复杂的相互作用。两种冰翼型在过冷大液滴（SLD）和非SLD条件下被认为是在过量的大液滴（SLD）和非SLD条件下。我们数值和先前的实验数据之间的平均性质的良好一致性表明我们的LES方法提供了冰翼型周围的复杂流的精确解决方案。，而不是不稳定的雷诺瓦斯平均的Navier-Stokes（urans）数据独立模拟。对于在SLD和非SLD条件下的冰翼型，发现空气动力学降解与清洁翼型的空气动力学降解相比，因为由冰渐变剪切层（SL）轨迹从Slat CUSP脱落的分离气泡（SB），引导严重减少质量流量。此外，我们表明滑板间隙附近的流动相互作用在确定主和翼片元件上的流动特性（例如，流分离）中起着至关重要的作用。尽管对于非SLD壳体的存在，但由于存在上华喇叭形冰，但SLD壳体的较小间隙距离导致更大的升力。在非SLD条件下的板条和主元件的上表面上的SBS在非SLD条件下的不稳定特征是通过低频率和高频具有多个峰的压力波动的功率谱密度（PSD）。 （c）2020 Elsevier Masson SAS。版权所有。

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  • 来源
    《Aerospace science and technology》 |2021年第2期|106417.1-106417.25|共25页
  • 作者

    Lee Young Mo; Lee Jae Hwa; Raj Lawrence Prince; Jo Je Hyun; Myong Rho Shin;

  • 作者单位

    Ulsan Natl Inst Sci & Technol UNIST Dept Mech Engn 50 UNIST Gil Ulsan 44919 South Korea;

    Ulsan Natl Inst Sci & Technol UNIST Dept Mech Engn 50 UNIST Gil Ulsan 44919 South Korea|Gyeongsang Natl Univ Res Ctr Aircraft Care Technol Jinju 52828 Gyeongnam South Korea|Gyeongsang Natl Univ ReCAPT Jinju 52828 Gyeongnam South Korea;

    Indian Inst Engn Sci & Technol Dept Aerosp Engn & Appl Mech Howrah 711103 W Bengal India;

    Gyeongsang Natl Univ Sch Aerosp & Software Engn Jinju 52828 Gyeongnam South Korea;

    Gyeongsang Natl Univ Res Ctr Aircraft Care Technol Jinju 52828 Gyeongnam South Korea|Gyeongsang Natl Univ ReCAPT Jinju 52828 Gyeongnam South Korea|Gyeongsang Natl Univ Sch Aerosp & Software Engn Jinju 52828 Gyeongnam South Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Large-eddy simulation; Multi-element iced airfoil; Aerodynamics;

    机译：大涡模拟;多元素冰翼型;空气动力学;

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