50390399 centrifugal compressor

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TURBO-MACHINERY

P M V Subbarao

Professor

Mechanical Engineering Department

Combined Practicals & Design Tutorials…..



Seven Laboratory Practicals +

Seven Design Practicals

•Single Report by Sub-group for Lab

Practicals. (5 points per report)

•Individual Reports for Design

Practicals. (10 Points per report)

•30% to 40% in total marks



List of Experiments

• Performance analysis of micro-axial flow fansattached to heat sinks.

• Performance analysis of centrifugal blowers.

•

Study of flow through axial compressors.• Performance analysis of turbochargers.

• Performance analysis of centrifugal and multistage

axial flow pumps.

• Study of flow through cascades and impellers.

• Study of flow through intakes and exhausts.



Centrifugal Blower



The Blower Laws - Evaluating Blower

Performance

• Characterized by dependent and

independent variables.

• Dependent: Static Pressure (Ps)

• Flow Rate ( Q )

• Power Required ( W )

•

Independent: Fan Size (D)• Fan Speed (N)

• Fluid Density (r)



Blower/fan Laws



Fan Performance Curve



Study of Flow through centrifugal Impeller



Anatomy of A Centrifugal Compressors



Study of Pressure and velocity

distributions in Aerofoil cascades.

• An aerofoil is build up around a basic camber line, which

is usually a curricular or a parabolic arc.

• An camber line is thus the skeleton of the aerofoil.

•

A thickness t is distributed over the camber line with theleading and trailing edge circles that finally form an

aerofoil.



Aerofoil Cascades

Generate, different

geometric angles,

blade setting and

their relationshipwith the flow angles

for a compressor

cascade.

Measure flow and pressure distribution in upstream and

downstream of an aerofoil cascade.

Measure pressure distribution on the surface of an aerofoil.



Study of Flow distribution and

Performance of Axial Compressors.

• Study the design and geometry of an axialflow compressor.

• Run the compressor at constant speed and

variable flow rate.• Run the compressor at variable speed.

• Study the characteristics of axial flow

compressor.• Measure the velocity distribution along the

height of the blade.



Axial Flow compressor



Compression Ignition Engine Cycle

A

I

R

Combustion

Products

Fuel injected

at TC

Intake

Stroke

Air

Compression

Stroke

Power

Stroke

Exhaust

Stroke

Actual

Cycle



Turbocharger Design

Process of the air flow:



Detailing Specific Parts

Compressor:



Turbocharger Design

Workings of the Turbocharger:

1. Exhaust waste from the engine cylinder travels towards theturbocharger.

2. Exhaust waste powers the turbine wheel which is connected to

the compressor wheel by the turbine shaft.

3. Turbine shaft rotates the compressor wheel drawing in and

compressing cool air.4. Compressed air travels through an intercooler for further cooling

before reaching the engine cylinder.

5. Fuel mixes with the compressed air and is ignited by the spark

plug.

6. Exhaust waste is let out by the combustion and the process

repeats itself (Nice).



S d f d l i di ib i i k



Study of Pressure and velocity distribution in Intakes

of Axial Flow Compressor .

50390399 centrifugal compressor

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