AERODYNAMIC AND PERFORMANCE STUDIES OF A THREE-STAGE HIGH PRESSURE RESEARCH TURBINE WITH 3-D - BLADES, DESIGN POINT AND OFF-DESIGN EXPERIMENTAL INVESTIGATIONS

摘要

This paper deals with the aerodynamic and performancernbehavior of a three-stage high pressure research turbine withrn3-D curved blades at its design and off-design operatingrnpoints. The research turbine configuration incorporates sixrnrows beginning with a stator row. Interstage aerodynamicrnmeasurements were performed at three stations, namelyrndownstream of the first rotor row, the second stator row, andrnthe second rotor row. Interstage radial and circumferentialrntraversing presented a detailed flow picture of the middlernstage. Performance measurements were carried out within arnrotational speed range of 75% to 116% of the design speed.rnThe experimental investigations have been carried out on thernrecently established multi-stage turbine research facility at thernTurbomachinery Performance and Flow Research Laboratory,rnTPFL, of the Texas A&M University.