Reliable means of predicting heat transfer in cavities adjacent to the main gas path are increasingly being sought by engineers involved in the design of gas turbines. In this paper an up-dated analysis of the interim results from an extended research programme, MAGPI, sponsored by the EU and several leading gas turbine manufactures and universities, will be presented. Extensive use is made of CFD and FE modelling techniques to understand the thermo-mechanical behaviour and convective heat transfer of a turbine stator well cavity, including the interaction of cooling air supply with the main annulus gas. It is also important to establish the hot running seal clearances for a full understanding of the cooling flow distribution and heat transfer in the cavity. The objective of the study has been to provide a means of optimising the design of such cavities (see Figure 1) for maintaining a safe environment for critical parts, such as disc rims and blade fixings, whilst maximising the turbine efficiency by means of reducing the fuel burn and emissions penalties associated with the secondary airflow system. The modelling methods employed have been validated against data gathered from a dedicated two-stage turbine rig, running at engine representative conditions. Extensive measurements are available for a range of flow conditions and alternative cooling arrangements. The analysis method has been used to inform a design change which will be tested in a second test phase. Data from this test will also be used to further benchmark the analysis method. Comparisons are provided between the predictions and measurements from the original configuration, turbine stator well component temperature survey, including the use of a coupled analysis technique between FE and CFD solutions.
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ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition
June 6–10, 2011
Vancouver, British Columbia, Canada
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-5465-5
PROCEEDINGS PAPER
Heat Transfer in Turbine Hub Cavities Adjacent to the Main Gas Path Including FE-CFD Coupled Thermal Analysis
Antonio Guijarro Valencia,
Antonio Guijarro Valencia
Rolls-Royce plc, Derby, UK
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Jeffrey A. Dixon,
Jeffrey A. Dixon
Rolls-Royce plc, Derby, UK
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Attilio Guardini,
Attilio Guardini
Rolls-Royce plc, Derby, UK
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Daniel D. Coren,
Daniel D. Coren
University of Sussex, Brighton, UK
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Daniel Eastwood
Daniel Eastwood
University of Sussex, Brighton, UK
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Antonio Guijarro Valencia
Rolls-Royce plc, Derby, UK
Jeffrey A. Dixon
Rolls-Royce plc, Derby, UK
Attilio Guardini
Rolls-Royce plc, Derby, UK
Daniel D. Coren
University of Sussex, Brighton, UK
Daniel Eastwood
University of Sussex, Brighton, UK
Paper No:
GT2011-45695, pp. 833-843; 11 pages
Published Online:
May 3, 2012
Citation
Guijarro Valencia, A, Dixon, JA, Guardini, A, Coren, DD, & Eastwood, D. "Heat Transfer in Turbine Hub Cavities Adjacent to the Main Gas Path Including FE-CFD Coupled Thermal Analysis." Proceedings of the ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition. Volume 5: Heat Transfer, Parts A and B. Vancouver, British Columbia, Canada. June 6–10, 2011. pp. 833-843. ASME. https://doi.org/10.1115/GT2011-45695
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