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The Growth of Vorticity in the Vicinity of a Wall of an Elastic Moving Airfoil and Their Developing Processes

[+] Author Affiliations
Tomoki Kurinami, Masaki Fuchiwaki, Kazuhiro Tanaka, Tetsushi Nagata

Kyushu Institute of Technology, Iizuka, Fukuoka, Japan

Paper No. AJK2011-08036, pp. 2255-2261; 7 pages
  • ASME-JSME-KSME 2011 Joint Fluids Engineering Conference
  • ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D
  • Hamamatsu, Japan, July 24–29, 2011
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-4440-3
  • Copyright © 2011 by JSME


The behavior of a vortex generated by a moving object subjected to vibration and fluidic noise has been investigated both experimentally and numerically. Animals fly and swim by skillfully controlling vorticies generated around their bodies. Moreover, an elastic airfoil that enables elastic deformation in order to fly and swim with low energy has recently attracted a great deal of attention, and industrial applications of this elastic airfoil are expected. The authors performed the PIV measurement for vortex flow in the vicinity of a wall of the elastic NACA0010 and clarified quantitatively the change in the developing process of vortices generated in the vicinity of a wall with elastic deformation. The vorticity generated in the vicinity of the wall near the elastic NACA0010 continues to increase until the acceleration becomes maximum, because the vorticity develops for main flow direction (x-direction). Therefore, the growth and development of vortices generated in the vicinity of the wall near the trailing edge of a heaving airfoil depend strongly on the variation of accelerations of the trailing edge.

Copyright © 2011 by JSME
Topics: Vorticity , Airfoils



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