1. isothermal compression
2. adiabatic compression
3. isentropic compression
4. polytropic compression
adiabatic compression
1. no flow of air
2. fixed mass flow rate regardless of pressure ratio
3. reducing mass flow rate with increase in pressure ratio
4. increased inclination of chord with air steam
fixed mass flow rate regardless of pressure ratio
1. 1 : 1.2
2. 1 : 2
3. 1 : 5
4. 1 : 10
1 : 1.2
1. 6 kg/cm2
2. 10 kg/cm2
3. 16 kg/cm2
4. 25 kg/cm2
10 kg/cm2
1. air stream blocking the passage
2. motion of air at sonic velocity
3. unsteady, periodic and reversed flow
4. air stream not able to follow the blade contour
unsteady, periodic and reversed flow
1. mass flow rate
2. pressure ratio
3. change in load
4. stagnation pressure at the outlet
stagnation pressure at the outlet
1. pressure ratio
2. pressure coefficient
3. degree of reaction
4. slip factor
degree of reaction
1. centrifugal pump
2. reciprocating pump
3. turbine
4. sliding vane compressor
turbine
1. larger air handling ability per unit frontal area
2. higher pressure ratio per stage
3. aerofoil blades are used
4. higher average velocities
larger air handling ability per unit frontal area
1. same as isothermal
2. same as adiabatic
3. better than isothermal and adiabatic
4. in between isothermal and adiabatic
in between isothermal and adiabatic