Lista zgłoszonych artykułów

The main purpose of this article is to point out causes of reduced fuel consumption in aircraft jet engine when it is in ground effect influence. Wing in ground effect is informally call as air cushion effect, and it is occurs in direct proximity of ground, which often is water. The paper presents wing in ground effect description, with numerical analysis of NACA M8 airfoil in three different conditions of flight, which are free air stream flight, wing in ground effect flight, and wing in ground effect flight with jet engine gas exhaust redistribution on airfoil surface to improve lift coefficient. Numerical analysis was conduct in Ansys Fluent 17.2 software. Article also shows numerical meshes which were created in ICEM CFD with all boundary conditions from three cases. Paper shows results of simulations which describes wing in ground effect influence on NACA M8 airfoil with two cases of jet engine exhaust gases usage, first with exhaust gases stream turns on upper airfoil surface, and second with exhaust gases stream turns under lower airfoil surface. Results allows to define characteristics of NACA M8 airfoil in influence of wing in ground effect which are lift coefficient, drag coefficient, drop of fuel consumption usage by jet engine when lift coefficient remains still in wing in ground effect, and optimal angle of attack in free air and in wing in ground effect. Paper shows that in wing in ground effect aircraft energy usage for flight in ground effect is smaller than for free air flight. Article points out advantages and disadvantages of wing in ground craft. Wing in ground effect is also present in automotive.