首页> 外文期刊>Journal of Engineering for Gas Turbines and Power >Combined Numerical and Experimental Study on the Use of Gurney Flaps for the Performance Enhancement of NACA0021 Airfoil in Static and Dynamic Conditions
【24h】

Combined Numerical and Experimental Study on the Use of Gurney Flaps for the Performance Enhancement of NACA0021 Airfoil in Static and Dynamic Conditions

机译:牙龈翼叶翅膀使用对静态和动态条件下Naca0021翼型性能增强的数值和实验研究

获取原文
获取原文并翻译 | 示例
       

摘要

Power augmentation devices in wind energy applications have been receiving increasing interest from both the scientific and the industrial community. In particular, Gurney flaps (GFs) showed a great potential thanks to the passive functioning, the simple construction, and the possibility to add them as a retrofit to existing rotors. Within this context, the authors have performed an extended investigation on the lift increase capabilities of GFs for the well-known NACA 0021 airfoil, which has been used in several wind energy applications up to now. This paper shows the results of a combined experimental and numerical analysis considering different geometrical configurations of the flaps under both static and dynamic conditions. Experimental data were first obtained for the AoA range of 180 degrees at a Reynolds number of 180 k to analyze the impact of three different geometrical configurations of the GF on the aerodynamic behavior. The geometrical configurations were defined by varying the length of the flap (1.4% and 2.5% of the chord) and its inclination angle with respect to the blade chord (90 deg and 45 deg). The experimental investigation involved also dynamic sinusoidal pitching movements at multiple reduced frequencies to evaluate the stall hysteresis cycle. An unsteady computational fluid dynamics (CFD) numerical model was calibrated against wind tunnel data and then exploited to extend the investigation to a wider range of Reynolds numbers for dynamic AoA rates of change typical of vertical-axis wind turbines, i.e., characterized by higher reduced frequencies with a nonsinusoidal motion law.
机译:风能应用中的功率增强设备一直受到科学和工业界的越来越兴趣。特别是,由于被动功能,简单的结构和将它们加入到现有转子的改造,盖齿襟翼(GFS)表现出极大的潜力。在这种情况下,作者对众所周知的Naca 0021翼型进行了延长的GFS的提升能力,这已经用于几种风能应用。本文显示了考虑到静态和动态条件下的襟翼的不同几何配置的组合实验和数值分析的结果。首先在180K的雷诺数为180 k的AOA范围内获得实验数据,以分析GF对空气动力学行为的三种不同几何配置的影响。通过改变翼片(弦曲线的1.4%和2.5%)的长度及其相对于叶片弦(90℃和45℃)来定义几何配置。涉及的实验研究还包括多种减少频率的动态正弦俯仰运动,以评估失速滞后循环。对风隧道数据进行校准不稳定的计算流体动力学(CFD)数值模型,然后剥削以将对垂直轴风力涡轮机的典型变化的动态AOA率的更广泛的Reynolds数进行调查,即,其特征在于减少频率与非轴承型行动法。

著录项

  • 来源
    《Journal of Engineering for Gas Turbines and Power》 |2021年第2期|021004.1-021004.15|共15页
  • 作者单位

    Department of Industrial Engineering University of Florence Via di Santa Marta 3 Firenze 50139 Italy;

    Fluid Dynamics Hermann-Foettinger-Institut Technische Universitaet Berlin Mueller-Breslau-Str. 8 Berlin 10623 Germany;

    Department of Industrial Engineering University of Florence Via di Santa Marta 3 Firenze 50139 Italy;

    Fluid Dynamics Hermann-Foettinger-Institut Technische Universitaet Berlin Mueller-Breslau-Str. 8 Berlin 10623 Germany;

    Fluid Dynamics Hermann-Foettinger-Institut Technische Universitaet Berlin Mueller-Breslau-Str. 8 Berlin 10623 Germany;

    Department of Industrial Engineering University of Florence Via di Santa Marta 3 Firenze 50139 Italy;

    Fluid Dynamics Hermann-Foettinger-Institut Technische Universitaet Berlin Mueller-Breslau-Str. 8 Berlin 10623 Germany;

    Department of Industrial Engineering University of Florence Via di Santa Marta 3 Firenze 50139 Italy;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号