Added Mass Effect and an Extended Unsteady Blade Element Model of Insect Hovering

doi:10.1016/S1672-6529(11)60044-9

J4 ›› 2011, Vol. 8 ›› Issue (4): 387-394.doi: 10.1016/S1672-6529(11)60044-9

Added Mass Effect and an Extended Unsteady Blade Element Model of Insect Hovering

Xingyao Yan¹, Shanan Zhu², Zhongdi Su¹, Hongjun Zhang¹

1. College of Metrology Technology and Engineering, China Jiliang University, Hangzhou 310018, P. R. China
2. College of Electrical Engineering, Zhejiang University, Hangzhou 310027, P. R. China

出版日期:2011-12-30
通讯作者: Xingyao Yan E-mail:zju_yan@163.com

Added Mass Effect and an Extended Unsteady Blade Element Model of Insect Hovering

Xingyao Yan¹, Shanan Zhu², Zhongdi Su¹, Hongjun Zhang¹

1. College of Metrology Technology and Engineering, China Jiliang University, Hangzhou 310018, P. R. China
2. College of Electrical Engineering, Zhejiang University, Hangzhou 310027, P. R. China

Online:2011-12-30
Contact: Xingyao Yan E-mail:zju_yan@163.com

摘要/Abstract

摘要：

During the insect flight, the force peak at the start of each stroke contributes a lot to the total aerodynamic force. Yet how this force is generated is still controversial. Two current explanations to this are wake capture and Added Mass Effect (AME) mechanisms. To study the AME, we present an extended unsteady blade element model which takes both the added mass of fluid and rotational effect of the wing into account. Simulation results show a high force peak at the start of each stroke and are quite similar to the measured forces on the physical wing model. We found that although the Added Mass Force (AMF) of the medium contributes a lot to this force peak, the wake capture effect further augments this force and may play a more important role in delayed mode. Furthermore, we also found that there might be an unknown mechanism which may augment the AME during acceleration period at the start of each stroke, and diminish the AME during deceleration at the end of each stroke.

关键词: added mass, wake capture, insect flight, simplified aerodynamic model

Abstract:

Key words: added mass, wake capture, insect flight, simplified aerodynamic model

Xingyao Yan, Shanan Zhu, Zhongdi Su, Hongjun Zhang. Added Mass Effect and an Extended Unsteady Blade Element Model of Insect Hovering[J]. J4, 2011, 8(4): 387-394.

参考文献

[1] Dickinson M H, Lehmann F-O, Sane S P. Wing rotation and the aerodynamic basis of insect flight. Science, 1999, 284, 1954–1960.
[2] Sane S P, Dickinson M H. The aerodynamic effects of wing rotation and a revised quasi-steady model of flapping flight. Journal of Experimental Biology, 2002, 205, 1087–1096.
[3] Sun M, Tang J. Unsteady aerodynamic force generation by a model fruit fly wing in flapping motion. Journal of Experimental Biology, 2002, 205, 55–70.
[4] Sane S P. The aerodynamics of insect flight. Journal of Experimental Biology, 2003, 206, 4191–4208.
[5] Birch J M, Dickinson M H. Spanwise flow and the attachment of the leading-edge vortex on insect wings. Nature, 2001, 412, 729–733.
[6] Birch J M, Dickinson M H. The influence of wing–wake interactions on the production of aerodynamic forces in flapping flight. Journal of Experimental Biology, 2003, 206, 2257–2272.
[7] Wu J H, Sun M. The influence of the wake of a flapping wing on the production of aerodynamic forces. Acta Mechanica Sinica, 2005, 21, 411–418.
[8] Fry S N, Sayaman R, Dickinson M H. The aerodynamics of hovering flight in Drosophila. Journal of Experimental Biology, 2005, 208, 2303–2318.
[9] Walker J A. Rotational lift: Something different or more of the same?. Journal of Experimental Biology, 2002, 205, 3783–3792.
[10] Osborne M F M. Aerodynamics of flapping flight with application to insects. Journal of Experimental Biology, 1951, 28, 221–245.
[11] Ellington C P. The aerodynamics of hovering insect flight. I. The quasi-steady analysis. Philosophical Transactions of the Royal Society of London B, 1984, 305, 1–15.
[12] Ellington C P. The aerodynamics of hovering insect flight. IV. Aerodynamic mechanisms. Philosophical Transactions of the Royal Society of London B, 1984, 305, 79–113.
[13] Ellington C P. Insects versus birds: The great divide. 44th AIAA Aerospace Sciences Meeting and Exhibit, 2006, 35, 1–6.
[14] Wang Z J. Dissecting insect flight. Annual Review of Fluid Mechanics, 2005, 37, 183–210.
[15] Bergou A J, Xu S, Wang Z J. Passive wing pitch reversal in insect flight. Journal of Fluid Mechanics, 2007, 591, 321–337.
[16] Rivero M, Magnaudet J, Fabre J. New results on the forces exerted on a spherical body by an accelerated flow. C.R. Acad. Sci. Paris Ser. II, 1991, 312, 1499–1506.
[17] Chang E, Maxey M. Unsteady flow about a sphere at low to moderate Reynolds number Part 2. Accelerated motion. Journal of Fluid Mechanics, 1995, 303, 133–153.
[18] Bagchi P, Balachandar S. Steady planar straining flow past a rigid sphere at moderate Reynolds number. Journal of Fluid Mechanics, 2002, 466, 365–407.
[19] Wakaba L, Balachandar S. On the added mass force at finite Reynolds and acceleration numbers. Theoretical and Computational Fluid Dynamics, 2007, 21, 147–153.
[20] Berman G J, Wang Z J. Energy-minimizing kinematics in hovering insect flight. Journal of Fluid Mechanics, 2007, 582, 153–168.
[21] Sane S P, Dickinson M H. The control of flight by a flapping wing: Lift and drag production. Journal of Experimental Biology, 2001, 204, 2607–2626.

Added Mass Effect and an Extended Unsteady Blade Element Model of Insect Hovering

Added Mass Effect and an Extended Unsteady Blade Element Model of Insect Hovering

PDF (PC)

赞

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 0

Metrics

本文评价

推荐阅读 0