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Combustor

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Gas Turbine Combustor: The Hot Core Of Energy Conversion

Gas Turbine Combustor: The Hot Core Of Energy Conversion

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Gas turbine combustor: the hot core of energy conversion

During operation, high-pressure air compressed by the compressor enters the combustion chamber through the air inlet. Part of the air is rotated by the swirler, and the fuel nozzle sprays the fuel into the combustion chamber to fully mix with the rotating air. This mixing process is crucial to combustion efficiency. Good mixing can make the fuel burn completely in the shortest time and release a large amount of heat energy.

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The combustion chamber must be able to withstand the extremely high temperatures generated during the combustion process. In order to meet this challenge, in addition to using high-temperature resistant materials, a series of cooling technologies are also used. For example, by designing cooling channels on the combustion chamber wall, cooling air is introduced to reduce the wall temperature. At the same time, thermal barrier coatings can effectively reduce the transfer of heat from the fuel gas to the combustion chamber wall, thereby ensuring the structural integrity and service life of the combustion chamber in high-temperature environments. 

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During the combustion process, the pressure changes inside the combustion chamber need to be effectively controlled. On the one hand, it is necessary to ensure that the pressure generated by the combustion can effectively drive the turbine to rotate; on the other hand, it is necessary to prevent excessive pressure from causing damage to the combustion chamber structure or other safety problems. Therefore, the structural design of the combustion chamber and the adjustment of operating parameters need to take pressure control into account, and usually work in conjunction with the overall control system of the gas turbine to maintain a stable pressure environment.

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Starting point of energy conversion: The combustion chamber is the starting link of energy conversion in the gas turbine. It converts the chemical energy of the fuel into high-temperature, high-pressure gas internal energy through combustion, providing a power source for the subsequent work of the turbine. If the performance of the combustion chamber is poor, such as incomplete combustion or low energy conversion efficiency, it will directly affect the output power and efficiency of the entire gas turbine system.
Impact on system stability: The working state of the combustion chamber directly affects the stability of the gas turbine system. A stable combustion process can ensure that the gas turbine can operate smoothly under various operating conditions (such as different loads, speeds, etc.). On the contrary, if the combustion chamber has problems such as unstable combustion, flame extinction or flashback, it may cause the gas turbine to vibrate more, the output power fluctuates, and may even cause system failures and safety accidents.

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