5ME6-PRINCIPLES OF TURBOMACHINES |
Units: I |
Basic concepts of turbomachines: Definition of Turbomachine, classification; Basic laws
and governing equations; continuity equation, steady flow energy equation(1sl law of
thermodynamics),2nci law of thermodynamics applied to turbomachines, Newton's 2nd law
of motion applied to turbomachines - Euler's pump equation and Euler's turbine equation,
dimensional analysis applied to hydraulic machines, power coefficient, flow coefficient,
head coefficient, non-dimensional specific speed; Range of 'specific speeds for
various turbomachines. Dimensional analysis applied to compressible flow machines,
pressure ratio as a Function of temperature ratio, mass flow rate parameter and speed
parameter.
|
Units: II |
Centrifugal pumps: Main parts, work done and velocity triangles, slip and slip factor,
pump losses and efficiencies, minimum starting speed, net positive suction head,
performance curve. |
Units: III |
Axial flow pumps; Description, velocity triangles, work done on the fluid, energy transfer,
axial pump characteristics, cavitation.
|
Units: IV |
Centrifugal compressors and fans: Components and description, velocity diagrams, slip
factor, energy transfer, power input factor, stage pressure rise and loading coefficient,
pressure coefficient, degree of reaction. Centrifugal compressor characteristic, surging,
rotating Stall and Choking.
|
Units: V |
Axial flow compressors and fans: Basic constructional features; turbine v/s compressor
blades; Advantages of axial flow compressors, working principle, velocity triangle,
elementary theory; stage work, work done factor, stage loading, degree of reaction;
vortex theory; simple design calculations; introduction to blade design; cascade test;
compressibility effects; operating characteristics.
|
|