| 摆动水翼绕流的数值研究 |
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| 引用本文： | 何国毅,张星,张曙光.摆动水翼绕流的数值研究[J].力学学报,2010,42(1):15-22. |
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| 作者姓名： | 何国毅 张星 张曙光 |
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| 作者单位： | 京航空航天大学航空科学与工程学院 中国科学院力学研究所LNM 北京航空航天大学交通科学与工程学院 |
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| 基金项目： | 国家自然科学基金(10732090,10872201);;973项目非线性科学(2007CB814800)资助项目~~ |
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| 摘 要： | 鱼类经常采用垂直流向的摆动进行游动, 这种摆动可以用行进波来表示. 应用浸入边界方法模拟了低雷诺数条件下水翼NACA65-010在水中摆动时的流场，并研究了雷诺数对水生动物推进效率的影响. 结果表明:随着雷诺数的增大，推力系数和推进效率增大，而功率系数减小；在Re<20时，推力系数，推进效率和功率系数的变化尤为剧烈. 随雷诺数增加，由于水翼摆动诱导的流场变化也更加复杂，水翼后缘处的涡量场强度逐渐增强. 摆动诱导反卡门涡街产生推力.
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| 关 键 词： | 水翼 摆动 推进 浸入边界方法 反卡门涡街 |
| 收稿时间： | 2008-09-18 |
NUMERICAL STUDIES ON FLOWS AROUND A FLEXIBLLY WIGGLING HYDROFIOL |
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| He Guoyi
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Zhang Xing
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Zhang Shuguang.NUMERICAL STUDIES ON FLOWS AROUND A FLEXIBLLY WIGGLING HYDROFIOL[J].chinese journal of theoretical and applied mechanics,2010,42(1):15-22. |
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| Authors: | He Guoyi Zhang Xing Zhang Shuguang |
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| Institution: | +/a>;2;**;The School of Aeronautic Science and Engineering/a>;Beihang University/a>;Beijing 100083/a>;China;LNM/a>;Institute of Mechanics/a>;Chinese Academy of Sciences/a>;Beijing 100080/a>;China;The School of Transport Science and Engineering/a>;China |
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| Abstract: | Fishes often use a wiggling motion to generate propulsion for swimming.The wiggling motion can be modeled by a progressive wave.In the present study,an immersed boundary method is used to simulate the flows around the wiggling hydrofoil NACA 65-010 at low Reynolds numbers,and the effects of Reynolds numbers on the propulsion generation are investigated.It is observed that,as the Reynolds number ranges from 1 to 200,both the thrust coefficient and the propulsion efficiency increase with the increase of the R... |
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| Keywords: | hydrofoil wiggling propulsion immersed boundary method reversed von Karman vortex streets |
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