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.

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Course Curriculum

Introduction to Turbo machines Syllabus, References and Schedules Details 47:19
Axial Flow Compressors and Fans : Introduction to Compressor Aerothermodynamics Details 53:6
A two dimensional analytical model :Cascade Details 53:44
2D losses in Axial flow Compressor Stage : Primary losses Details 54:39
Tutorial 1 : Two Dimensional Axial Flow Compressors Details 57:24
3D Flows in Blade Passages, Secondary Flows, Tip leakage Flow, Scrubbling Details 52:57
Three Dimensional Flow Analysis : Radial Equilibrium Concept Details 50:40
Classical Blade Design Laws : Free Vortex and other Laws Details 57:2
Three Dimensional Flow Analysis in Axial Flow Compressor Details 1:1:19
Tutorial 2: Three Dimensional Axial Flow Compressors Details 55:3
Axial Compressor Characteristics: Single stage, Multi stage and Multi Details 53:53
Instability in Axial Compressors Details 57:44
Inlet Distortion and Rotating Stall, Control of Instability Details 58:25
Transonic Compressors and Shock Structure Models, Transonic Compressor Characteristics Details 58:21
Axial Flow Compressor Design, Inter Spool Duct Details 57:46
Design of Compressor Blades, Aerofoil Design (Subsonic, Transonic, Supersonic) Details 55:54
Design of Compressor Blade: 3D Blade Shapes of Rotors and Stators Details 56:41
Noise Problem in Axial Compressors and Fans Details 47:35
Axial Flow Turbines: Introduction to Turbines Aerothermodynamics Details 44:52
Axial Flow Turbines: Turbine Blade 2D (Cascade) Analysis Details 55:49
Axial Flow Turbines: Work done, Degree of Reaction, Losses and Efficiency Details 53:24
Axial Flow Turbines: Blade and Axial Flow Passages, Exit Flow Matching with Nozzle Details 55:36
Tutorial 3 : Axial Flow Turbines Details 57:20
Multi staging and Multi spooling of Turbine Details 45:14
3D Flow in Turbine: 3D Flow Theories, Free Vortex Theories etc. Details 51:5
Tutorial 4 : 3D Flows in Axial Flow Turbines Details 47:21
Turbine Blade Cooling – Fundamentals of Heat Transfer, Blade Cooling Requirements Details 53:33
Turbine Blade Cooling Technologies Details 1:1:20
Turbine Blade Design: Turbine Profiles, Aerofoil Data and Profile Construction Details 1:2:9
Turbine Blade Design: 3D Blade Shapes Details 58:19
Centrifugal Compressors: Thermodynamics and Aerodynamics Details 53:55
Centrifugal Compressors : Characteristics, Stall, Surge Problems Details 51:22
Tutorial 5 : Centrifugal Compressors Details 50:38
Design of Centrifugal Compressors: Impellers, Vane/Vane less Diffusers, Volutes Details 1:30
Radial Turbines: Thermodynamics and Aerodynamics Details 52:52
Tutorial 6 : Radial Turbines Details 56:28
Radial Turbine Characteristics and Design of Radial Turbines Details 55:19
CFD for Turbomachinery: Grid Generation, Boundary Conditions for Flow Analysis Details 54:52
-CFD for Turbomachinery: Flow Track and Inter-spool Duct Design using CFD Details 55:44
CFD for Turbomachinery: 2D and 3D Blade Generation and Analysis Using CFD Details 59:1

This course is delivered by IIT Bombay , as part of NPTEL Free Courses sponsored by Govt of India.

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