Purge–Mainstream Interactions in a Turbine Stage With Rotor Endwall Contouring
Alex W. Mesny,
Oliver J. Pountney,
James A. Scobie
et al.
Abstract:Purge flows are prevalent in modern gas turbine design allowing for increased turbine entry temperatures. The purge flow passes through a rim seal and interacts with the mainstream flow, modifying the blade secondary flow structures and reducing stage efficiency. These structures may be controlled using End Wall Contouring (EWC), though experimental demonstration of their benefit is seldom reported in the literature. The optically accessible turbine at the University of Bath was designed to directly measure an… Show more
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