Experimental investigation of trailing-edge devices at transonic speeds

摘要

The influence of trailing-edge devices such as Gurney flaps and divergent trailing edges of different height on the aerodynamic per- formance of an aerofoil at transonic speeds has been investigated ex- perimentally. The investigation has been carried out in the Transonic Wind Tunnel Gottingen (TWG) using the two-dimensional aerofoil model VC-Opt at freestream Mach numbers of M ∈ [0.755, 0.775, 0.790] and a Reynolds number of Re = 5.0 × 10~6. The results have shown that the trailing-edge devices increase the circulation of the aerofoil leading to a lift enhancement and pitching- moment decrease as well as an increase in minimum drag compared to the baseline configuration.