Aerodynamic Performance of Micro Flexible Flapping Wing by Numerical Simulation
Its aerodynamic performance is complex for the fluid-structure coupling mechanism is an unveiled problem,which restricts the applications of flexible FMAV.In this paper,the aerodynamic performance of flexible flapping wing is investigated through numerical simulation based on fluid-structure coupling method,which is developed on the Navier-Stokes equations and structural dynamic equations.In addition,the interface data exchange method is based on radial basis function and the moving mesh generation method is based on infinite interpolation.The flexible flapping wings we investigated are constructed of a carbon fiber skeleton and a thin extensible membrane in a bird like scale with the chord Re of 5e4.This research focused on the influence of different flexibilities with same wing structure topology.The flexibility is controlled by diameters of carbon fiber skeleton and five structures are analyzed.The simulation results proved that the structural deformation has a significant effect on the aerodynamic force,especially on the thrust.The deformation manners and aerodynamic performances are analyzed.Different structural flexibilities cause different deformation manners,and induce the diverse aerodynamic performances.The wing with maximum rigidity has the best lift performance but the worst thrust performance; vice versa,the wing with maximum flexibility has the best thrust performance but the worst lift performance.A wing with medium rigidity gets better performance in both lift and thrust.According to the results,it is necessary to balance the relations between structure flexibility and aerodynamic performance.Meantime,the characteristics of different structures are consistent with the variety of attack angle and flapping frequency.The results of this paper are helpful to understand and analyze the aerodynamic performance of micro flexible flapping wing for the FMAV designers.
Flapping wing flexible fluid-structure coupling numerical simulation aerodynamic performance
Yang Wenqing Wang Liguang Xue Dong Song Bifeng
School of Aeronautics,Northwestern Polytechnical University,Xian 710072,China
国际会议
2014 Asia-Pacific International Symposium on Aerospace Technology(2014亚太航空航天技术学术会议)
上海
英文
1-6
2014-09-24（万方平台首次上网日期，不代表论文的发表时间）