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Analysis of the Caudal Vortices Evolvement around Flapping Foil |
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| Authors: | Wang Zhi-dong Zhang Xiao-qing Su Yu-min Xu Yu-ru |
| Institution: | Wang Zhi-dong(College of Naval Architecture and Ocean Engineering, Jiangsu Scientific and Technology University,Zhenjiang 212003, P. R. China)；Zhang Xiao-qing(College of Naval Architecture and Ocean Engineering, Jiangsu Scientific and Technology University,Zhenjiang 212003, P. R. China)；Su Yu-min(College of Naval Architecture, Harbin Engineering University, Harbin 150001, P. R. China)；Xu Yu-ru(College of Naval Architecture, Harbin Engineering University, Harbin 150001, P. R. China)； |
| Abstract: | The viscous flow field around two-dimensional flapping (heaving and pitching) foils was numerically computed. The structural characteristics of caudal vortices were investigated and the contour curves at different phase angles were obtained. The relationships between the structural characteristics of the vortices and the force acting on the foil and between the widths of the caudal vortex street and of the caudal flow field were analyzed. A method to determine the shedding frequency of the vortices was proposed. |
| Keywords: | foil viscous flow field caudal vortices |
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