Numerical investigation on the aerodynamics characteristics of a WIG craft airfoil with different turbulence models

Airfoil in ground effect characteristics is important in aircraft take off and landing and in WIG vehicle design. WIG crafts operate close ground. Flow over the NACA 1100 is investigated numerically with two different models of k-ε model, Realizable and RNG, the result compared with experimental study. Studies were performing in 5.0 and 5.0 degree angles of attack and in three high from ground, H/C=1.5,1.0,1.0. It was found higher values of lift coefficient are obtained when the airfoil is close to the ground and a loss of upper surface suction was recorded as the airfoil approached the ground for all angles of attack, resulting in rapid decay of kinetic energy over the upper surface, leading to a thicker wake and higher turbulence level and a higher drag. It's obtained that Realizable k-ε give closer result to experimental data than RNG k-ε.

کلیدواژه ها:

Aerodynamics ، Wing in ground effect (WIG) ، Turbulence modeling ، k-ε model ، NACA 1100