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 fl ow 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 twodimensional airfoil, and also suction into the engine unit on the inner contour of the vortex cell of a thick airfoil stabilize the fl ow 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.
   
Author:  S. A. Isaev, A. E. Usachov, S. A. Sustin, S. A. Isaev, A. E. Usachov, S. A. Sustin,
Keywords:  thick airfoil, low-aspect-ratio wing, vortex cell, turbulence, calculation
Page:  742