Analysis of Parameters of the Flow around an Airfoil in the Test Section of the Low-Speed Wind Tunnel

The mathematical model of the 2D-flow in the test section of the T-500 low-speed wind tunnel and in the undisturbed stream is justified by comparison of results of calculations, using Navier-Stokes equations together with SST and k-e turbulence models, and test data. The flow patterns in the wind-tunnel test section with both airfoil presence and without it are studied for 2D case. The wash angles for the flow around the airfoil in the wind-tunnel test section and in the undisturbed stream are determined. The calculations results of aerodynamic characteristics of the airfoil at angles of attack from 0 to 20° and with Reynolds numbers of 6.3•10⁵, 2.88•10⁶, and 4•10⁶ are presented. For Reynolds number of 6.3•10⁵, differences are revealed in dependences of the airfoil's aerodynamic characteristics on angle of attack in flow around the TsAGI V12% airfoil in the undisturbed stream and the wind tunnel.

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