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蜻蜓爬升过程间歇性拍动飞行现象的数值研究

刘佳佳 郑孟宗 潘天宇 李秋实

刘佳佳, 郑孟宗, 潘天宇, 等 . 蜻蜓爬升过程间歇性拍动飞行现象的数值研究[J]. 北京航空航天大学学报, 2017, 43(10): 2118-2126. doi: 10.13700/j.bh.1001-5965.2016.0766
引用本文: 刘佳佳, 郑孟宗, 潘天宇, 等 . 蜻蜓爬升过程间歇性拍动飞行现象的数值研究[J]. 北京航空航天大学学报, 2017, 43(10): 2118-2126. doi: 10.13700/j.bh.1001-5965.2016.0766
LIU Jiajia, ZHENG Mengzong, PAN Tianyu, et al. Numerical study on intermittent flapping flight performance of dragonfly during climbing[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(10): 2118-2126. doi: 10.13700/j.bh.1001-5965.2016.0766(in Chinese)
Citation: LIU Jiajia, ZHENG Mengzong, PAN Tianyu, et al. Numerical study on intermittent flapping flight performance of dragonfly during climbing[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(10): 2118-2126. doi: 10.13700/j.bh.1001-5965.2016.0766(in Chinese)

蜻蜓爬升过程间歇性拍动飞行现象的数值研究

doi: 10.13700/j.bh.1001-5965.2016.0766
基金项目: 

北京航空航天大学研究生创新实践基金 YCSJ-01-2016-06

详细信息
    作者简介:

    刘佳佳  女, 硕士研究生。主要研究方向:非定常气体动力学

    潘天宇  男, 博士。主要研究方向:流动稳定性

    通讯作者:

    潘天宇, E-mail: pantianyu@buaa.edu.cn

  • 中图分类号: V211.7

Numerical study on intermittent flapping flight performance of dragonfly during climbing

Funds: 

Innovation and Practice Fund for Graduate Student of Beihang YCSJ-01-2016-06

More Information
  • 摘要:

    采用数值模拟方法研究了蜻蜓双翼做间歇性拍动运动时的气动特征。计算结果表明,在所研究的雷诺数工况下(Re=157),模型翼的平均升力系数和平均推力系数随着间歇占比的增大而减小,前段下降较快,中段下降平缓,后段下降至零。其中平均推力系数受到的影响相对平均升力系数更大,当连续飞行转变为间歇性飞行时,短暂滑翔初期和短暂滑翔稳定阶段均大幅削弱推力系数,共占42.7%;而对于升力系数,短暂滑翔稳定期对升力系数的削弱作用很大,占41.4%,但短暂滑翔初期却对平均升力系数的提高贡献8%。间歇拍动飞行能够提高蜻蜓飞行的升推比,当滑翔时长占间歇飞行周期之比为0.3时,平均升推比接近为1。

     

  • 图 1  圆柱在计算域中的相对位置

    Figure 1.  Relative position of circular cylinder in computational domain

    图 2  圆柱绕流阻力系数对比

    Figure 2.  Comparison of drag coefficient of flow around a circular cylinder

    图 3  单翼在一个周期内的扑翼规律

    Figure 3.  Wing flapping law of single wing in a stroke

    图 4  φ为0°时拍动幅度Φ和翻转角α在一个周期内随时间变化运动函数

    Figure 4.  Time-dependent motion function of flapping amplitude Φ and pitching angle α in a stroke (φ=0°)

    图 5  蜻蜓爬升过程中翼面拍动幅度随时间变化曲线

    Figure 5.  Time-dependent flapping amplitude of dragonfly wings during climbing

    图 6  平均力系数随间歇占比的变化

    Figure 6.  Variation of average force coefficient with different gliding time proportions

    图 7  不同间歇占比的间歇拍动飞行的瞬时推力系数

    Figure 7.  Time-dependent thrust coefficient with different gliding time proportions of intermittent flapping flight

    图 8  不同间歇占比的间歇拍动飞行的瞬时推力系数在t/T∈(0, 1) 期间的变化规律对比

    Figure 8.  Comparison of change laws of time-dependent thrust coefficient with different gliding time proportions of intermittent flapping flight during t/T∈(0, 1)

    图 9  不同间歇占比的间歇拍动飞行的瞬时推力系数在t/T∈(2, 3) 期间的变化规律对比

    Figure 9.  Comparison of change laws of time-dependent thrust coefficient with different gliding time proportions of intermittent flapping flight during t/T∈(2, 3)

    图 10  不同间歇占比的间歇拍动飞行的瞬时升力系数

    Figure 10.  Time-dependent lift coefficient with different gliding time proportions of intermittent flapping flight

    图 11  不同间歇占比的间歇拍动飞行的瞬时升力系数在t/T∈(0, 1) 期间的变化规律对比

    Figure 11.  Comparison of change laws of time-dependent lift coefficient with different gliding time proportions of intermittent flapping flight during t/T∈(0, 1)

    图 12  不同间歇占比的间歇拍动飞行的瞬时升力系数在t/T∈(2, 3) 期间的变化规律对比

    Figure 12.  Comparison of change laws of time-dependent lift coefficient with different gliding time proportions of intermittent flapping flight during t/T∈(2, 3)

    图 13  平均升推比随间歇占比的变化

    Figure 13.  Variation of average lift-thrust ratio with different gliding time proportions

    表  1  Re=25圆柱绕流流场细节对比

    Table  1.   Comparison of flow field details around a circular cylinder at Re=25

    结果来源尾迹
    长度
    尾迹最宽处
    x轴坐标
    尾涡中心
    x轴坐标
    两尾涡中心点的
    y方向距离
    本文1.200.891.040.42
    Gresho[15]1.150.810.880.47
    Saiki[16]1.411.030.50
    Coutanceau[17]1.220.850.940.51
    下载: 导出CSV
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出版历程
  • 收稿日期:  2016-09-29
  • 录用日期:  2016-12-16
  • 刊出日期:  2017-10-20

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