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Analysis of Turbo Combustor

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Analysis of Turbo Combustor

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    1. Analysis of Turbo Combustor P M V Subbarao Professor Mechanical Engineering Department

    2. Reciprocating Engine Vs Jet Engine

    4. Fire is An Accident…

    5. Laws of Combustion A Special Device is required to hold the flame, called Burner. The maximum quantity of fuel that can be handled by a single burner is limited. The maximum allowable air to establish efficient combustion of a given amount of fuel is limited. The maximum temperature due to efficient combustion is always higher than the maximum safe temperature: limited by turbine blades. Infra structure should be provided to facilitate these conditions.

    6. Requirements of A Reliable Combustion

    7. Combustion Section The combustion section contains the combustion chambers, igniter plugs, and fuel nozzle or fuel injectors. Designed to burn a fuel-air mixture and to deliver combusted gases to the turbine at a temperature not exceeding the allowable limit at the turbine inlet. Theoretically, the compressor delivers 100 percent of its air by volume to the combustion chamber. The fuel-air mixture suitable for efficient combustion has a ratio of l5 parts air to 1 part fuel by weight.

    8. Combustion Section Contd…….

    9. Air Distribution in A Combustor

    10. Functions The air used for burning is known as primary air; Remaining for cording is secondary air. Secondary air is controlled and directed by holes and louvers in the combustion chamber liner. Igniter plugs function during starting only; they are shut off manually or automatically. Combustion is continuous and self-supporting. After engine shutdown or failure to start, a pressure - actuated valve automatically drains any remaining unburned fuel from the combustion chamber. The primary function of the combustion section is, of course, to bum the fuel-air mixture, thereby adding heat energy to the air.

    11. To do this efficiently, the combustion chamber must Provide the means for mixing the fuel and air to ensure good combustion. Bum this mixture efficiently. Cool the hot combustion products to a temperature which the turbine blades can withstand under operating conditions. Deliver the hot gases to the turbine section. The location of the combustion section is directly between the compressor and turbine sections. .

    13. Basic Anatomy of A Combustor

    14. Classification of Combustors Basis for this classification: A burner handles finite amount of fuel. Arrangement of multiple burners. There are currently three basic types of Burner Arrangements The multiple-chamber or can type. The annular or basket type. The can-annular type.

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