The LEMCOTEC 1½ Stage Film-Cooled HP Turbine: Design, Integration and Testing in the Oxford Turbine Research Facility

Under the EU LEMOCTEC programme, the Oxford Turbine Research Facility (OTRF) was upgraded to include a modern 1½ stage, high-pressure turbine with film cooled high-pressure guide vanes (HPVs) and low-turning intermediate pressure vanes (IPVs). The facility has also been upgraded to include a third-generation engine-representative combustor temperature and swirl simulator at inlet, allowing the study of turbine interactions with inlet conditions representative of a modern lean burn combustor. This paper presents the aerodynamic and mechanical design of the LEMCOTEC high-pressure turbine and its integration and commissioning in the OTRF. Test data with uniform inlet flow is presented, acting as a baseline to assess the performance benefit of optimising the turbine design for a non-uniform combustor exit flow-field. Measurement techniques are discussed, and experimental data is compared to pre-test design CFD results from both the Rolls-Royce HYDRA code and the commercial CFX code.

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