摆动水翼的推力与流场结构数值研究

何国毅; 张曙光; 张星

doi:10.3879/j.issn.1000-0887.2010.05.006

摆动水翼的推力与流场结构数值研究

doi: 10.3879/j.issn.1000-0887.2010.05.006

飞行器工程学院南昌航空大学,南昌 330063;
航空科学与工程学院北京航空航天大学,北京 100191;
交通科学与工程学院北京航空航天大学,北京 100191;

详细信息

作者简介:
何国毅(1968- ),男,湖北沙市人,工程师,博士(Tel:+86-791-3953393;E-mail:heguoyi680812@yahoo.com.cn);张星,男,副研究员(联系人.Te:l+86-10-82543929;E-mail:zhangx@lnm.imech.ac.cn).

中图分类号: O351
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出版历程
- 收稿日期: 1900-01-01
- 修回日期: 2010-04-06
- 刊出日期: 2010-05-15

Thrust Generation and Wake Structure of a Wiggling Hydrofoil

The School of Aircraft Engineering, Nanchang Hangkong University, Nanchang 330063, P. R. China;
The School of Aeronautic Science and Engineering, Beihang University, Beijng 100191, P. R. China;
The School of Transport Science and Engineering, Beihang University, Beijing 100191, P. R. China;
LNM, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, P. R. China

摘要

摘要: 在一定的Reynolds数范围内，水生动物和微型仿生机械通常采用摆动的方式获得推力，这种摆动可以用行进波来表示，行进波的波长则描述了摆动生物的柔性．该文用浸入边界方法模拟了低Reynolds数情况下，水翼NACA-65-010在水中摆动时的流场．结果表明，水翼摆动产生推力的大小与行进波波长密切相关，随着波长的增大，推力系数减小，推进效率则在一定的波长值达到最大；推力的产生与两种流场结构有关：即反Krmn涡街和涡对，摆动水翼后缘尾迹中形成反Krmn涡街时产生的推力要大于尾迹中形成涡对产生时的推力．
- 推进效能 /
- 摆动 /
- 尾迹 /
- 浸入边界法
Abstract: A wiggling motion is often used by marine anmials and micro-machines to generate thrust. The wiggling motion can be modeled by aprogressive wave where its wavelength describes the flexibility of wiggling anmials. In the present study, animmersed boundary method was used to smiulate the flows around the wiggling hydrofoil NACA-65-010 at low Reynolds numbers. It is found from the numerical s im ulations that the thrust generation is largely determined by the wave length: The thrust coefficients decrease with increasing the wavelength while the propulsive efficiency reaches maxmium at acertain wave length. The latter is due to the viscous effects. The thrust generation is associated with two different flow patterns in the wake: the well-known reversed Krmn vortex streets and the vortex dipoles. Both of them are jettype flows where the thrust coefficients associated with the reversed Krmn vortex streets are larger than the ones associated with vortex diploes.
- propulsive performance /
- wiggling motion /
- wake /
- immersed boundary method

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参考文献(25)

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