A method, system and electronic device for determining combustion chamber exit reflectivity

By acquiring static data and dynamic pressure sensor signals from the gas turbine, and combining one-dimensional flow analysis and a multi-microphone method, the problem of real-time measurement of combustion chamber outlet reflectivity under extreme operating conditions was solved. This enabled real-time monitoring and evaluation of the gas turbine combustion chamber outlet reflectivity, improving the transferability of the experiment and the accuracy of gas turbine performance analysis.

CN122409199APending Publication Date: 2026-07-17CHINA UNITED GAS TURBINE TECH CO LTD
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA UNITED GAS TURBINE TECH CO LTD
Filing Date
2026-04-08
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing technologies struggle to measure reflectivity in real time under extreme conditions of high temperature, high-speed airflow, and strong noise interference at the combustion chamber outlet. This results in significant discrepancies between test results and actual operating conditions, failing to meet the engineering requirements for online monitoring and active control of thermoacoustic stability.

Method used

By acquiring static data of the gas turbine, a one-dimensional flow analysis model is used to determine the temperature and flow rate functions. Combined with signals collected by multiple dynamic pressure sensors in the transition section of the combustion chamber, a multi-microphone method is used to calculate the reflectivity of the combustion chamber outlet in real time.

Benefits of technology

It enables real-time measurement of combustion chamber outlet reflectivity under full-engine conditions, providing important data references, improving the transferability between component testing and full-engine testing, and supporting gas turbine combustion adjustment and thermoacoustic performance evaluation.

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Abstract

The application provides a combustion chamber outlet reflectivity determination method, system and electronic equipment. The method comprises the following steps: obtaining static data of a gas turbine at any moment, wherein the static data at least comprises a gas turbine load, an inlet temperature of a combustion chamber, an inlet pressure, an outlet temperature and an outlet pressure; determining a temperature function and a flow rate function related to an axial distance of the gas turbine based on the static data and a one-dimensional flow analysis model; obtaining signals collected by multiple dynamic pressure sensors at a combustion chamber transition section of the gas turbine, wherein at least two dynamic pressure sensors in the multiple dynamic pressure sensors are located at different cross sections with different axial distances to the combustion chamber outlet cross section; and determining the reflectivity of the combustion chamber outlet at any moment based on the temperature function, the flow rate function and all signals collected by the multiple dynamic pressure sensors. The reflectivity parameters of the real gas turbine combustion chamber outlet under different working conditions can be obtained, and the transferability of component testing and whole machine testing is improved.
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