Method and device for evaluating outlet temperature of combustion chamber of gas turbine in real time and gas turbine

By monitoring conventional parameters at the gas turbine inlet and outlet boundaries and combining them with thermodynamic laws and flow characteristics, an evaluation model was constructed to achieve real-time online evaluation of the combustion chamber outlet temperature. This solved the problem of difficult monitoring of gas turbine combustion chamber temperature and ensured the safe, stable operation and efficient control of the gas turbine.

CN121598756APending Publication Date: 2026-03-03AECC CHINA GAS TURBINE ESTAB
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Patent Information

Application Number
CN202511688291.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-18
Publication Date
2026-03-03

AI Technical Summary

Technical Problem

Existing technologies make it difficult to achieve real-time online monitoring of the combustion chamber outlet temperature of gas turbines, resulting in the difficulty of accurately obtaining core temperature data during the whole-machine testing and actual operation phases of gas turbines, which affects the life assessment of hot-end components and the control of combustion efficiency.

Method used

By deploying sensor systems at the inlet and outlet boundaries of the gas turbine, atmospheric environment, fuel supply, and unit operating parameters are monitored in real time. Combining the first law of thermodynamics and the critical flow state at the throat of the turbine's first-stage guide vane, an evaluation model is constructed to achieve online evaluation of the combustion chamber outlet temperature.

Benefits of technology

It eliminates the need for detailed characteristic curves of components such as the compressor or turbine, simplifying the assessment process of the combustion chamber outlet temperature and providing key data support for real-time monitoring and efficient control, thus ensuring the safe and stable operation of the gas turbine.

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Abstract

The invention relates to the technical field of equipment parameter monitoring, in particular to a gas turbine combustion chamber outlet temperature real-time evaluation method and device and a gas turbine. The method comprises the steps that atmospheric environment parameters, fuel supply parameters, exhaust parameters and unit operation parameters are monitored in real time; on the basis of the first law of thermodynamics, the atmospheric environment parameters and the fuel supply parameters serve as input energy items, the exhaust parameters and the unit operation parameters serve as output energy items, a first evaluation model is constructed, and the air flow of the inlet of the air compressor is predicted in real time through the first evaluation model; based on the compressor inlet air flow, the bleed air proportionality coefficient and the pressure loss coefficient, the combustion chamber outlet pressure is predicted through a second evaluation model; and a third evaluation model is constructed by combining the critical flow state maintained by the throat of the turbine first-stage guide blade, and the combustion chamber outlet pressure is input into the third evaluation model to calculate the combustion chamber outlet temperature. Online evaluation of the outlet temperature of the combustion chamber of the gas turbine can be realized, and the monitoring efficiency is improved.
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