Syllabus
Introduction to Turbomachines. Dimensional Analyses and Performance Laws.
Axial Flow Compressors and Fans: Introduction – aero-thermodynamics of flow through an axial flow compressor stage – losses in axial flow compressor stage – losses and blade performance estimation, radial equilibrium equation – design of compressor blades – 2-D blade section design, axial compressor characteristics – multi-staging of compressor characteristics – high Mach number compressor stages – stall and surge phenomenon – low speed ducted fans.
Axial Flow Turbines: Introduction – turbine stage – turbine blade 2-D (cascade) analysis work done – degree of reaction – losses and efficiency – flow passage – subsonic, transonic and supersonic turbines – multi-staging of turbine – exit flow conditions – turbine cooling – turbine blade design – turbine profiles, airfoil data and profile construction.
Centrifugal Compressors: Introduction – elements of centrifugal compressor/fan – inlet duct impeller – slip factor – concept of rothalpy – modified work done – incidence and lag angles – diffuser – centrifugal compressor characteristics – surging, chocking, rotating stall.
Radial Turbine: Introduction – thermodynamics and aerodynamics of radial turbines – radial turbine characteristics – losses and efficiency.
Text Books
- Same as Reference
References
1. Cumpsty, N. A., Compressor Aerodynamics, 2nd ed., Krieger Pub. Co. (2004).
2. Johnsen, I. A. and Bullock, R. O. (Eds.), Aerodynamic Design of Axial-Flow Compressors, NASA SP-36 (1965).
3. El-Wakil, M. M., Powerplant Technology, McGraw Hill (1985).
4. Glassman, A. J. (Ed.), Turbine Design and Application, NASA SP-290 (1972).
5. Lakshminarayana, B., Fluid Dynamics and Heat Transfer of Turbomachinery, Wiley (1995).
6. El-Sayed, A. F., Aircraft Propulsion and Gas Turbine Engines, CRC Press (2008).
7. Dixon, S. L. and Hall C. A., Fluid Mechanics and Thermodynamics of Turbomachinery, 7th ed., Butterworth-Heinemann (2014).
Course Outcomes (COs):
CO1: To be thorough with thermodynamic performance of diffusers, compressors, turbines, noz- zles along with Euler turbine equation.
CO2: To study the performance of axial compressors with velocity triangle and dimensional anal- ysis.
CO3: To design and analyse axial compressors based on Degree of reaction, Stability margin, Cascade analysis, and by following different vortex theories.
CO4: To know the importance of radial compressors.
CO5: To construct velocity triangles of radial compressor at different reactions.
CO6: To understand the performance of radial compressor based on non-dimensional analysis and stability.
CO7: To be familiar with velocity triangles of axial/ radial turbines as well as their difference from the compressors.
CO8: To know the different types of turbines based on reaction and their design.