Numerical Simulation of Ground-Effect Wing with Front Engine Blowing

The application of the front engine jet in the external blowing flap was studied by numerical simulation. The effects of different parameters such as jet intensity, jet angle and flap angle on the aerodynamic performance of the ground effect wing were compared. The results show that the front engine jet can increase the lift of the ground effect wing during takeoff. When the engine jet intensity and jet angle change, the change of its position will affect the lift effect, and the lift coefficient reaches the maximum when the jet directly acts on the flap surface. Increasing the flap deflection angle during external blowing will strengthen the ground effect, but it will aggravate the flow separation on the flap surface while increasing the lift of the ground effect wing. The numerical results describe the flow field characteristics of the external blowing flap under strong ground effect conditions. The optimal lift enhancement scheme depends on the matching design of the engine and the ground effect wing.