2022
DOI: 10.33737/gpps22-tc-36
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Aerodynamic Influence of Rim Seal Purge Flow Injection on the Main Flow in a 1.5-Stage Axial Turbine with Non-Axisymmetric End Wall Contouring

Abstract: This paper presents an investigation of the aerodynamic influence of rim seal purge flow injection on the main flow in a 1.5-stage turbine with non-axisymmetric end walls and a bowed stator using experimental flow measurements and unsteady RANS simulations. The study focuses on the secondary vortex structures formed in the rotor passages of the 1.5- stage axial turbine rig. Through performance map measurements, it was found that the efficiency gain of the non-axisymmetric configuration is partially eliminated … Show more

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