Definition and Classification of turbomachines - Specific Work - T-s and h-s Diagram
- Incompressible and compressible flow – Losses - Total–to–Total efficiency -
Total-to-Static efficiency - Effect of reheat and preheat factor. Degree of reaction.
Energy transfer - Euler’s equation, velocity triangles.
Dimensional analysis, Dimensionless parameters and their physical significance,
specific speed, Hydraulic Pumps: Centrifugal Pumps – Some definitions - Pump
output and Efficiencies - Effect of Vane angle – Cavitation - Pump Characteristics
- Multistage pumps.
Hydraulic Turbines: Classification of hydraulic turbines - Velocity triangles.
Efficiencies of draft tubes - Hydraulic turbine characteristics. Francis and Kaplan
turbines - Velocity triangles - Efficiencies of Draft tubes - Turbine characteristics.
Elementary cascade theory, cascade nomenclature, compressor cascade, turbine
cascade, cascade efficiency. Dimensional analysis of compressible flow machines,
stalling and surging.
Centrifugal Compressors: Constructional details - Stage Pressure rise - Stage
Pressure Coefficient - Stage Efficiency - Degree of Reaction - Various Slip factors
- Introduction to Fans and Blowers, Working principle, Fan laws, Performance
Axial flow Compressors: general expression for degree of reaction; velocity
triangles for different values of degree of reaction, Blade loading and flow
coefficient, Static pressure rise, Workdone factor.
Steam and Gas Turbines: Axial turbine stages - Stage velocity triangles – Work -
Single stage impulse turbine - Speed ratio - Maximum utilization Factor - Compounding
of Turbines and its types, Degree of Reaction - Reaction Stages. Inward Flow
radial turbine stages (IFR) - Working principle and Performance Characteristics.