Mechanical Engineering(6th Sem.)
Turbo Machinery Books__________________________________Turbo Machinery from IIT Delhi 15/04/2012
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Turbo Machinery from IIT Delhi-1 15/04/2012
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Turbo Machinery from IIT Delhi-2 15/04/2012
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Turbo Machinery__________________________________1. Unit-1
2. Unit-2
3. Unit-3
4. Unit-4
5. Unit-5
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Turbo Machinery SyllabusUNIT – I
Impulse Turbine Steam turbine – Principal of operation of steam turbine, types, impulse turbine compounding of steam turbinepressure compounded velocity compounded and pressure – velocity compounded impulse turbine. Velocity diagram for impulse turbine, force on the blade and work done. Blade or diagram efficiency, gross stage efficiency. Influence of ratio of blade to steam speed on blade efficiency in a single stage impulse turbine. Efficiency of multi-stage turbine. Impulse blade sections, choice of blade angle. Blade height in velocity compounded impulse turbine. UNIT – II Impulse Reaction Turbine Velocity diagram, degree of reaction, impulse-reaction turbine with similar blade section and half degree of reaction. (Parson’s turbine) Height of reaction turbine blading section internal losses in steam turbine Nozzle, Losses, blade friction losses, disc friction losses, blade windage losses or partial admission losses, gland leakage or clearance losses, leaving velocity or residual loss, carry loss. UNIT – III State Point Locus and Reheat Factor Factor-Stage, efficiency of impulse turbines, stage point locus of an impulse turbine, state point locus for multistage turbine reheat factor. Internal efficiency, over all efficiency,relative efficiency, Governing of steam turbine. Throttle governing, nozzle governing, bypass governing, combination of throttle and nozzle, governing and combination of bypass and throttle governing. Effect of governing on the performance of steam turbine. UNIT – IV Gas Turbine Classification of gas turbine. Simple open cycle gas turbine Ideal and actual cycle (Brayton Cycle) for gas turbine Optimum pressure ratio for maximum specific output in actual gas turbine Regneration, reheat and inter cooling and effect of these modification on efficiency and output, closed cycle gas turbine. UNIT – V Turbo Compressors Introduction, classifications of Centrifugal compressors – components, working, velocity diagrams, calculations of power and efficiencies. Slip factor, surging and choking power and efficiencies. Axial Flow Compressor- Construction and working, velocity diagram, calculation of power and efficiencies. Degree of reaction, work done factor, stalling, comparison of centrifugal and axial flow compressor. |
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