Lecture PPTs (22) - Lect 24 1 Lect 24 Axial Flow Turbine...

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1 Lect 24
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2 Prof. Bhaskar Roy, Prof. A M Pradeep, Department of Aerospace, IIT Bombay Lect 24 Axial Flow Turbine Multi-staging and Multi-spooling
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3 Prof. Bhaskar Roy, Prof. A M Pradeep, Department of Aerospace, IIT Bombay Lect 24 Requirement for multi-staging of turbines comes from the aggregate of shaft work that needs to be produced . Typically if turbine pressure ratio requirement is more than 2.5 / 3.0 - multi-staging is required. As compression ratio over the years have kept on increasing, multi-staging has become inevitable in all aero-engines. Number of integer stages to be decided by the state of art of turbine design Multi-staging
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4 Prof. Bhaskar Roy, Prof. A M Pradeep, Department of Aerospace, IIT Bombay Lect 24 Multi-spooling of Turbines Multi-spooling of turbines is necessary if the compressors have been split in more than one spool Multi-spooling is necessary in a turbo-prop engine if the propeller is needed to be run separately (with a gear box) Most modern aero-engines are 2-spool engines and there are few with 3-spool arrangements
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