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Experimental Study on the Effect of Secondary Vortices at the Trailing Edge on Motion-Induced Vortex Vibration

  • K. MatsudaEmail author
  • K. Kato
  • N. Cao
  • R. Higashimura
Conference paper
Part of the Lecture Notes in Civil Engineering book series (LNCE, volume 27)

Abstract

According to the results of conventional wind tunnel tests on rectangular cross sections with side ratios of B/D = 2–8 (B: along-wind length (m), D: cross-wind length (m)), motion-induced vortex vibration was confirmed. The generation of motion-induced vortex vibration is considered to be caused by the unification of separated vortices from the leading edge and secondary vortices at the trailing edge. Spring-supported tests and smoke flow visualization tests for B/D = 0.62, 0.75, 1.0, 1.18 and 1.50 were conducted in a wind tunnel at Kyushu Institute of Technology. As a result, it was considered that the secondary vortices at the trailing edge are not always essential for the generation of the motion-induced vortex vibration in heaving motion of each cross section. In this study, smoke flow visualizations were performed for side ratios of B/D = 2.0, 4.0, 6.0 in order to elucidate the role of secondary vortices at the trailing edge in motion-induced vortex vibration in heaving motion. Spring-supported tests were also carried out in order to obtain the response characteristics of the models.

Keywords

Motion-induced vortex vibration Smoke flow visualizations Spring-supported tests Rectangular cross sections Side ratios 

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Department of Civil Engineering and ArchitectureKyushu Institute of TechnologyFukuokaJapan

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