Numerical Simulation of a Two-Dimensional Spatial Unsteady Flow Past Thick Airfoils and Low-Aspect-Ratio Wings with Slot Suction in a Vortex Cell as Applied to Hybrid Aerostatic Aircraft

Using numerical simulation on the basis of Reynolds-averaged Navier–Stokes equations in their closure with the SST turbulence model, a comparison has been conducted of the self-oscillating modes of flow around a thick airfoil and a low-aspect-ratio wing with a vortex cell in the presence or absence of slot suction. The inclusion of suction with placement of a ventilator in the off take channel and with jet ejection in the vicinity of the back edge of a two-dimensional airfoil, and also suction into the engine unit on the inner contour of the vortex cell of a thick airfoil stabilize the flow past bodies and improve substantially their aerodynamic characteristics. In a two-dimensional case, the aerodynamic quality increases to 7 and in a three-dimensional variant, it increases to 2.7.