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Lecture Details :
Turbomachinery Aerodynamics by Prof. Bhaskar Roy,Prof. A M Pradeep, Department of Aerospace Engineering, IIT Bombay. For more details on NPTEL visit http://nptel.iitm.ac.in
Course Description :
Contents:
Introduction to Turbomachineries
Axial flow compressors and Fans : Introduction - A simple two dimensional analytical model - 2-D Losses in axial flow compressor stage - Profile Loss and Blade performance estimation - 3-D flows in Blade passages - Secondary flows, Tip leakage flow, Scrubbing - Simple three dimensional flow analysis - Full Radial Equilibrium Equation - Free-vortex and other 3-D flow theories - Axial compressor characteristics - Single stage characteristics - Multi-staging of compressor characteristics - Multi-spool axial compressor characteristics, LPC, HPC - Instability in Axial Compressors - Loss of Pressure Rise and efficiency - Loss of Stability Margin - Rotating Stall and Surge, Modal and spike disturbance - Inlet Distortion and Rotating Stall - Vibrations and Fatigue - Design of compressor blades - 2-D blade section design : Airfoil Design – subsonic, transonic and supersonic profiles - Axial Flow Track Design and Inter-spool duct flow - Transonic Compressors and Shock Structure models in Transonic Blades - Transonic Compressor Characteristics - 3-D Blade shapes of Rotors and Stators in modern compressors - Compressor Instability and control - Noise problem in Axial Compressors and Fans.
Axial flow turbines : Introduction - Turbine stage - Turbine Blade 2-D (cascade) analysis - Work Done, Degree of Reaction, Losses and Efficiency - Flow Passage, Exit flow conditions - Multi-staging and Multi-spooling of Turbine - 3-D flows in Blade passages - Secondary flows, Tip leakage flow & Inter-spool ducts - Free-vortex and other 3-D flow theories - Turbine Blade Cooling - Turbine Blade design - Turbine Profiles : Airfoil Data and Profile construction - 3-D blade shapes.
Centrifugal Compressors and Radial flow turbines:
Centrifugal Compressors : Introduction - Elements of centrifugal compressor/ fan - Inlet Duct and guide vane, Impeller , Diffuser vanes and vaneless diffusers - Slip factor, Concept of Rothalpy, Modified work done - Inlet Incidence and Exit lag angles: Impeller and static vanes - Centrifugal Compressor Characteristics - Surging, Chocking, Rotating stall - Sources of Centrifugal Compressor Losses - Design of Centrifugal Compressors - Design of impellers - Design of subsonic and supersonic vaned diffusers, vaneless volutes.
Radial flow turbines : Introduction - Thermodynamics and Aerodynamics of radial turbines - Radial Turbine Characteristics - Losses and efficiency - Design of Radial Turbines.
Use of CFD for Turbomachinery analysis and design : Computer aided blade profile generation - Cascade Analysis ; Periodicity and boundary conditions - 3-D blade generation and 3-D flow analysis - Flow track and inter-spool duct analysis and design.
Other Resources :
Syllabus | Handouts | Citation |
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