3. ABSTRACT:
• Compressor industry has emerged from the decade of the 1980s right sized, streamlined and
computerized.
• Management trends includes a broadening of responsibility for all departments.
• In order to satisfy there new responsibilities.
• maintenance,operations,personal need continuous review of compressor types.classifications
and applications.
• In most of industries compressed air used for running a simple air tool or for complicated
tasks such as pneumatic controls.
4. INTRODUCTION:
• The machine which takes in air or any other gas at low pressure and compresses it to high
pressure are called compressors.
• They are power consuming machines in which mechanical work is converted into the pressure
head of air or gas.
• They are also considered as reversed heat engine.
• Generally,the compressors are driven by electric motors, I.C. engine or gas turbines.
• A compressor is used for increasing the pressure of air is called air compressor.
6. CENTRIFUGAL COMPRESSOR
• The centrifugal compressor consists essentially of a
stationary casing containing a rotating impeller
which imparts a high velocity to the air.
• A number od diverging passages(diffused) in which
the air is decelerated with a consequent rise in static
pressure.
• Air is sucked into the impeller eye and whirled
round at high speed by the vanes the impeller disc.
• Centripetal acceleration leads to increase rise of
some amount of static pressure.
• The remaining increase in rise of pressure occurs in
diffuser.
7. AXIAL COMPRESSOR:
• Axial flow compressors are dynamic rotating
compressors that use arrays of fan like airfoils to
progressively accelerate air.
• The arrays of airfoils are set in rows, usually as
pairs: one rotating and one stationary.
• The rotating airfoils, also known as blades or
rotors,accelerate the fluids.
• The decelerate and redirect the flow direction of the
fluid,preparing it for the rotor blades of the next
stage.
8. IMPELLER:
• The main part of a compressor is the impeller. The action of the impeller increases the fluid
velocity and pressure.
9. DIFFUSER:
• The diffuser is an important element of a compressor or pump. Its purpose Is to reduce the
velocity of the flow leaving the impeller resulting in an increase in pressure. The diffuser can
be simply depicted as a nonrotating channel whose flow area increases in the direction flow.
10. PRESSURE AND VELOCITY VARIATION ACROSS
THE COMPRESSOR:
Pressure and velocity variation curve across the compressor
11. ADVANTAGES:
• Centrifugal compressor:
• Low weight, easy to design and
manufacture.
• Suitable for continuous compressed air
supply, such as cooling unit.
• The free in nature.
• Relatively energy efficient.
• Wide range of rotational speed.
• Centrifugal compressors, low maintenance.
• It does not require special foundation.
• Axial compressor:
• High peak efficiency.
• Small fontal area for given flow.
• Straight through flow, allowing the high
ram efficiency.
• Increased pressure rise due to increased
number of stages with negligible losses.
12. APPLICATIONS:
• Centrifugal compressor:
• Air Separation.
• Chemical Processing.
• Electronics.
• Food & Beverage.
• Glass.
• Industrial Mfg..
• Oil Refining.
• Power Generation.
• Textiles.
• Axial compressor:
• jet engines.
• high speed ship engines,.
• small scale power stations.
• Blast furnaces.
• Nitric acid plants.
• Air separation plants.
• Fluid catalytic cracking units.
13. CONCLUSION:
What we have presented so far in this presentation is that what is dynamic compressor and its
types. here we discussed about dynamic compressors and various types of dynamic compressors,
advantages and applications of it.
14. REFERENCE:
Baljie,O.E.,Turbo machines, New York : John Wiley & Sons,Inc.(1981)
Whitfield, A.; Baines, N. C. (1990). Design of Radial Turbo machinery. Longman Scientific and
Technical.
W. R. Hawthorne (1964). Aerodynamics of Turbines and Compressors. Princeton New Jersey:
Princeton University Press.
Yahiya, S.M. (2011). Turbines, Compressors and Fans. Tata McGraw Hill Education Private
Limited.
