the growing process of the vortex structure at the location close to the wall surface and Movement-Fluid-Structure Interaction Mechanism

由于涡旋结构对物体表面的尾迹结构和流动力有直接的影响，因此研究物体壁面涡结构的生长过程是非常重要和有趣的。特别是对于弹性翼型等具有变形壁面的运动体，需要进行精确的研究。本课题采用流动可视化、PIV测量和数值研究相结合的方法，研究了运动弹性翼型近壁面位置涡结构的生长过程。结果表明，弹性翼型的动推力与基于后缘起伏幅值和频率的斯特劳哈尔数有很大关系。此外，升沉弹性翼型通过壁面变形从前缘向尾缘发展涡，具有与升沉刚性翼型不同的特点

It is very important and interesting to study growing process of vortex structure on the wall surface of a body because the vortex structure affects the wake structure and flow force on the body in a direct fashion. Especially on a moving body with deforming wall surface such as a elastic airfoil, the precise study is needed. In this project, the growing process of the vortex structure at the location close to the wall surface of the moving elastic airfoil has been studied by flow visualization and PIV measurement as well as numerical studies. As a result, it is verified that dynamic thrust acting on elastic airfoils is much dependent on the Strouhal number based on heaving amplitude and frequency of the trailing edge. Moreover, the heaving elastic airfoils develop the vortex with the characteristics different from heaving rigid airfoils from the leading edge toward the trailing edge by wall deformation