combustion chamber 2/5
DESCRIPTION
TRANSCRIPT
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Basic Systems•Multiple•Tubo-Annular•Annular Intro Process Fuel Supply
Types Materials AE 424COMBUSTION CHAMBER
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Intro Process Fuel Supply Types Materials AE 424COMBUSTION CHAMBER
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• Each interconnected can has its own fuel injector, igniter, liner, and casing; all acting as an individual burner units
• The interconnectors are required for flame propagation during ignition and for even pressure distribution throughout the combustion section. (flame propagation tubes)Intro Process Fuel Supply
Types Materials AE 424COMBUSTION CHAMBER
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• Air from the compressor enters each individual chamber through a transition section.
• Combustion occurs within the inner liner.
• Louvers and holes control airflow into the combustion area.
Intro Process Fuel Supply Types Materials AE 424COMBUSTION CHAMBER
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Pros and Cons• a high resistance
to warpage because of large
degree of curvature
• amount of space required and the added weight because of the shape
Intro Process Fuel Supply Types Materials AE 424COMBUSTION CHAMBER
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** provides a larger combustion volume per unit of exposed metal
area
• Annular inner and outer AIR CASINGS form a tunnel around the
centre line of the engine• The FLAME TUBE is located in the space between the inner and outer
air casing. • Need for INTERCONNECTORS
Intro Process Fuel Supply Types Materials AE 424COMBUSTION CHAMBER
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• USAGE: both small and large engines• MOST EFFICIENT: thermal efficiency,
weight, and physical size• Process: similar to multiple-can design• Maintenance: removed as a single unit;
complete separation of the engine at a major flange.
Intro Process Fuel Supply Types Materials AE 424COMBUSTION CHAMBER
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• The “Half-Way House”• combination of both annular (outer shell)
and can-type (number of cans) designs mounted about the engine axis.
• Inner combustion chamber casing: serves as structural support and a heat shield
• Bearing oil supply lines run through it
Intro Process Fuel Supply Types Materials AE 424COMBUSTION CHAMBER
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• was invented by Pratt & Whitney • removable steel shroud= encircles the
entire combustion section. • multiple burner cans assembled radially
around the engine axis can-annular combustor (ease of maintenance) contains individual burner cans in an annular liner
(compact efficiency)
Intro Process Fuel Supply Types Materials AE 424COMBUSTION CHAMBER
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Intro Process Fuel Supply Types Materials AE 424COMBUSTION CHAMBER
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• Multiple- earlier engines usage; simple to dismantle; bulky
• Tubo-annular- more compact, with a smooth exterior and reduced weight
• Annular system- much more compact system and, same power output and mass flow, shorter upto 25% length
Intro Process Fuel Supply Types Materials AE 424COMBUSTION CHAMBER