Shahrood University of Technology Journal of Solid and Fluid Mechanics 2251-9475 4 2 2014 06 22 Numerical investigation of influence geometry variation on the aerodynamic characteristics and static stability of Wing In Ground Effect Numerical investigation of influence geometry variation on the aerodynamic characteristics and static stability of Wing In Ground Effect 75 87 315 10.22044/jsfm.2014.315 FA Journal Article 2013 06 09 Wing in ground effect are suitable vehicle in military industries and marine transportations that can transport with sophisticated aerodynamic characteristics and appropriate speed. Using numerical simulation can reduce the costs and save the time for investigating wing's aerodynamic characteristics, that possesses a more acceptable precision in comparison with experimental data. <br />In this study, the results obtained from the experimental examination conducted on Naca6409 are used to validate the simulation and the best turbulence model with an appropriate number of mesh elements has been chosen. Also, the effect of ground effect and the angle of attack on important aerodynamic parameters have been calculated and static stability of these wings have been determined by investigating the effect of moving and fix wall on aerodynamic characteristics of WIG. Finally, with changes in wing's geometry factors such as twist angle, dihedral angle, sweep angle and taper ratio, the effect of these factors have been examined. As result sweep has not used for stability and also positive twist angle has used to decrease drag and delay in stall and taper ratio with increasing in aerodynamic characteristics, is better in trailing state. Wing in ground effect are suitable vehicle in military industries and marine transportations that can transport with sophisticated aerodynamic characteristics and appropriate speed. Using numerical simulation can reduce the costs and save the time for investigating wing's aerodynamic characteristics, that possesses a more acceptable precision in comparison with experimental data. <br />In this study, the results obtained from the experimental examination conducted on Naca6409 are used to validate the simulation and the best turbulence model with an appropriate number of mesh elements has been chosen. Also, the effect of ground effect and the angle of attack on important aerodynamic parameters have been calculated and static stability of these wings have been determined by investigating the effect of moving and fix wall on aerodynamic characteristics of WIG. Finally, with changes in wing's geometry factors such as twist angle, dihedral angle, sweep angle and taper ratio, the effect of these factors have been examined. As result sweep has not used for stability and also positive twist angle has used to decrease drag and delay in stall and taper ratio with increasing in aerodynamic characteristics, is better in trailing state. https://jsfm.shahroodut.ac.ir/article_315_ef231c9c8f3ef2b0c377cf72c6a9b163.pdf