Wake Signature and Strouhal Number Dependence of Finite-Span Flapping Wings

摘要：

A numerical study was conducted in order to investigate the unsteady aerodynamics of finite-span flapping rigid wings. The unsteady laminar incompressible Navier-Stokes equations were solved on moving overlapping structured grids using a second-order accurate in space and time finite-difference scheme. Specifically, finite-span rigid wings undergoing pure heaving and root-flapping motions were studied. From the results presented, it is found that root-flapping wings produce wake structures similar to those of heaving wings, but with the difference that the latter wing kinematics generates larger vortices and forces than root-flapping wings; aside from this, similar wake regimes occur at comparable values of the Strouhal number. The numerical simulations were performed at a Reynolds number of Re=250 and at different values of Strouhal number and reduced frequency.

关键词： rolling wings overlapping grids wake signature vortex rings horseshoe shaped vortex thrust production

作者: Joel E. Guerrero

作者单位: University of Genoa, Via Montallegro 1, Genoa, 16145, Italy

会议类型: 国际会议

会议名称: The 3rd International Conference of Bionic Engineering(第三届国际仿生工程会议ICBE10)

会议地点: 珠海

会议语种:英文

页码: 109-122

在线出版日期: 2010-09-14（万方平台首次上网日期，不代表论文的发表时间）