Bulletin of the American Physical Society
76th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 19–21, 2023; Washington, DC
Session S01: Poster Session & Refreshment Break IV (3:34 - 4:25 p.m.)
3:34 PM,
Monday, November 20, 2023
Room: Exhibit Hall D
Abstract: S01.00010 : Relationship between vortex dynamics in lift enhancement mechanism of corrugated wing*
Presenter:
Yusuke Fujita
(Hiroshima University)
Authors:
Yusuke Fujita
(Hiroshima University)
Makoto Iima
(Hiroshima University)
Aerodynamic performance of a corrugated wing may be closely related to the vortex motion generated due to the wing structure. We focus on the translational motion starting impulsively from the resting state in two-dimensional space. Flow analysis suggested that the eruption of a vortex with the opposite sign to the leading-edge vortex, called lambda vortex, discourages the aerodynamic performance [1,2]. Thus, the breakdown of lambda vortex looks a key of good aerodynamic performance. However, the analysis remains qualitative and quantitative validations are required.
In this presentation, we performed the quantitative analysis by focusing on a spatiotemporal distribution of vorticity above the wing. In particular, the quantities representing lambda vortex eruption were identified. We discuss the relationship between the quantities and the observed vortex dynamics as well as the lift coefficient [3].
*This work was partially supported by JSPS KAKENHI (19K03671, 21H05311, 22KJ2316) and SECOM Science and Research Foundation.
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