Experiments are conducted on a flat recovery wall downstream of sustained concave curvature in the presence of high free-stream turbulence. This flow simulates some of the features of the flow on the latter parts of the pressure surface of a gas turbine airfoil. The combined effects of concave curvature and TI, both present in the flow over a turbine airfoil, have so far little been studied. Computation of such flows with standard turbulence closure models has not been particularly successful. This experiment attempts to characterize the turbulence characteristics of this flow. In the present study, a turbulent boundary layer grows from the leading edge of a concave wall then passes onto a downstream flat wall. Results show that turbulence intensities increase profoundly in the outer region of the boundary layer over the recovery wall.
|Original language||English (US)|
|Number of pages||8|
|Journal||American Society of Mechanical Engineers (Paper)|
|State||Published - Jan 1 1993|
|Event||International Gas Turbine and Aeroengine Congress and Exposition - Cincinnati, OH, USA|
Duration: May 24 1993 → May 27 1993