矩形平板典型非定常拍动的三维效应
收稿日期: 2009-05-08
修回日期: 2009-05-13
网络出版日期: 2010-01-15
基金资助
国家自然科学基金项目(10602061)和中国科学院知识创新项目(KJCX2-YW-L05)资助
Three-dimensional effects of unsteady flapping rectangular plates
Received date: 2009-05-08
Revised date: 2009-05-13
Online published: 2010-01-15
孙一峰 , 鲍麟 , 余永亮 . 矩形平板典型非定常拍动的三维效应[J]. 中国科学院大学学报, 2010 , 27(1) : 1 -9 . DOI: 10.7523/j.issn.2095-6134.2010.1.001
Aerodynamic responses of rectangular plates with different aspect ratios during flapping motion were simulated using a three dimensional unsteady panel code. The three-dimensional effects during plunging and pitching motions were then analyzed. The results demonstrated that the added mass only contributes to the instaneous lift force. The amplitudes of lift forces induced by added mass effects would decrease with a decreasing aspect ratio, but the time-averaged contributions were always zero. Vortices shedding from trailing and side edges of rectangular plates are sources of time-averaged lift forces. As the signature of streamwise vortices would change during one flapping cycle, the three-dimensional effects on vortex-induced lift forces would reduce as the flow unsteadiness increased.
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