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伞衣透气性对翼伞气动特性的影响

汪龙芳 贺卫亮 王世超

汪龙芳, 贺卫亮, 王世超等 . 伞衣透气性对翼伞气动特性的影响[J]. 北京航空航天大学学报, 2017, 43(10): 2021-2029. doi: 10.13700/j.bh.1001-5965.2016.0764
引用本文: 汪龙芳, 贺卫亮, 王世超等 . 伞衣透气性对翼伞气动特性的影响[J]. 北京航空航天大学学报, 2017, 43(10): 2021-2029. doi: 10.13700/j.bh.1001-5965.2016.0764
WANG Longfang, HE Weiliang, WANG Shichaoet al. Effects of canopy's air permeability on parafoil aerodynamic performance[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(10): 2021-2029. doi: 10.13700/j.bh.1001-5965.2016.0764(in Chinese)
Citation: WANG Longfang, HE Weiliang, WANG Shichaoet al. Effects of canopy's air permeability on parafoil aerodynamic performance[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(10): 2021-2029. doi: 10.13700/j.bh.1001-5965.2016.0764(in Chinese)

伞衣透气性对翼伞气动特性的影响

doi: 10.13700/j.bh.1001-5965.2016.0764
详细信息
    作者简介:

    汪龙芳  男, 博士研究生。主要研究方向:飞行器设计

    贺卫亮  男, 博士, 教授, 博士生导师。主要研究方向:飞行器设计

    通讯作者:

    贺卫亮, E-mail: heweiliang@buaa.edu.cn

  • 中图分类号: V221.3

Effects of canopy's air permeability on parafoil aerodynamic performance

More Information
  • 摘要:

    为了提高翼伞的飞行性能,需要研究伞衣织物透气性对翼伞气动特性的影响。使用不可压雷诺时均Navier-Stokes(RANS)方程模拟伞衣外部流场,建立了包含附加动量源项的多孔介质域控制方程模拟伞衣,对2种透气性材料模型和无透气性影响传统模型的气动特性和流场分布进行了二维和三维定常数值模拟。数值结果表明,求解多孔介质域控制方程可以得到较准确的伞衣透气速度,伞衣表面的湍流度急剧增加;使用较大透气量材料制作伞衣时,升力系数大幅下降,阻力系数大幅上升,同时会造成内腔泄压影响翼伞的外形保持;使用微透气量材料制作伞衣时,升力系数在小迎角时小于不透气模型,在大迎角时大于不透气模型,较小的透气速度能在大迎角时延缓边界层分离。

     

  • 图 1  织物的横截面微观结构

    Figure 1.  Cross-section microstructure of fabric

    图 2  411蚕丝绸的试验数据和拟合曲线[20]

    Figure 2.  Test data and fitted curve of 411 silk[20]

    图 3  翼型周围网格

    Figure 3.  Grid around airfoil

    图 4  多孔介质域和自由流动域

    Figure 4.  Porous medium domain and unrestricted flow domain

    图 5  100 Pa压差下的透气速度矢量图

    Figure 5.  Vectorgraph of air seepage velocity under 100 Pa differential pressure

    图 6  不同透气参数下的翼型升力系数和阻力系数

    Figure 6.  Lift and drag coefficients of airfoil with different air permeability parameters

    图 7  迎角6°时翼型的压力云图与流线图

    Figure 7.  Pressure contours and streamlines of airfoil at angle of attack 6°

    图 8  迎角6°时翼型的湍流黏度云图

    Figure 8.  Turbulent viscosity contours of airfoil at angle of attack 6°

    图 9  仿真对象

    Figure 9.  Simulation object

    图 10  计算域网格划分

    Figure 10.  Grid partition of computational domain

    图 11  不同透气参数下的翼伞升力系数和阻力系数

    Figure 11.  Lift and drag coefficients of parafoil with different air permeability parameters

    图 12  迎角6°时上翼面压力云图

    Figure 12.  Pressure contour of upper surface at angle of attack 6°

    图 13  迎角6°时F111织物伞衣的透气速度矢量图

    Figure 13.  Vectograph of air seepage velocity of F111 fabric canopy at angle of attack 6°

    图 14  迎角6°时上翼面湍流黏度云图

    Figure 14.  Turbulent viscosity contours of upper surface at angle of attack 6°

    表  1  2种材料的透气性参数

    Table  1.   Air permeability parameters of two materials

    材料 a/(kg·
    (m2·s)-1)
    b/(kg·
    m-3)
    C1/m2 C2/m-1
    411蚕丝绸 451.8 90.69 7.9×10-12 7.4×105
    F111织物 9 036 1 813.8 3.95×10-13 1.48×107
    下载: 导出CSV
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出版历程
  • 收稿日期:  2016-09-28
  • 录用日期:  2016-12-30
  • 刊出日期:  2017-10-20

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