50390399 Centrifugal Compressor
Transcript of 50390399 Centrifugal Compressor
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TURBO-MACHINERY
P M V Subbarao
Professor
Mechanical Engineering Department
Combined Practicals & Design Tutorials…..
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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
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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.
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Centrifugal Blower
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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)
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Blower/fan Laws
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Fan Performance Curve
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Study of Flow through centrifugal Impeller
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Anatomy of A Centrifugal Compressors
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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.
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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.
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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.
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Axial Flow compressor
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Compression Ignition Engine Cycle
A
I
R
Combustion
Products
Fuel injected
at TC
Intake
Stroke
Air
Compression
Stroke
Power
Stroke
Exhaust
Stroke
Actual
Cycle
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Turbocharger Design
Process of the air flow:
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Detailing Specific Parts
Compressor:
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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).
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S d f d l i di ib i i k
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Study of Pressure and velocity distribution in Intakes
of Axial Flow Compressor .
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