An experimental study on the influence of the wake traverse position on the integral pressure loss coefficients in a transonic high-pressure turbine cascade is presented. Realistic operating points for turbomachinery with Mach numbers ranging from Ma2th = 0.94 − 1.10 at a constant exit Reynolds number of Re2th = 1,200,000 are examined. The total pressure fields are estimated from planar Particle Image Velocimetry (PIV) measurements by applying a pressure reconstruction approach. The data is validated against five-hole probe measurements showing very good agreement. The findings demonstrate that the wake topology is influenced by the surrounding free-stream velocity, leading to a repetitive pattern of constrictions and dilations. The mixed-out loss coefficient was found to be the most sensitive to the axial traverse position. The evolution of the loss coefficient in the regarded near wake region is not exclusively dependent on the shape of the wake.     «

An experimental study on the influence of the wake traverse position on the integral pressure loss coefficients in a transonic high-pressure turbine cascade is presented. Realistic operating points for turbomachinery with Mach numbers ranging from Ma2th = 0.94 − 1.10 at a constant exit Reynolds number of Re2th = 1,200,000 are examined. The total pressure fields are estimated from planar Particle Image Velocimetry (PIV) measurements by applying a pressure reconstruction approach. The data...     »