Low-emission three-loop lean oil pre-mixing and active combustion control device and method

Abstract

The invention discloses a low-emission three-loop lean oil pre-mixing and active combustion control device and method, and aims at solving the problem that the pre-mixing of the lean oil in the working process of an existing gas turbine or aircraft engine leads to unstable combustion, resulting in high combustion pollutant emission. The method is characterized in that a pre-mixing equivalence ratio based fuel oil control mode is that the lean oil is pre-mixed and the equivalence ratio of the fuel oil and the air is controlled to achieve the full combustion of the fuel oil and the reduction of the temperature of combustion flame, so as to realize the reduction of NOx emission; an acoustic pressure phase delay based fuel oil control mode is that the fuel oil filling time is controlled to inhibit the unstable thermal noise in combustion according to the measured noise pressure vibration condition and through the phase delay algorithm; an LMS (Least Mean Square) based fuel oil control mode is that the temperature of a combustion low-cycle heat release circulation area is measured, and then the LMS algorithm is carried out to control the fuel oil filling quantity so as to solve the problem of thermal shock of the low-cycle heat release circulation area, and as a result, the combustion instability can be reduced.

Description

technical field [0001] The invention belongs to the field of active combustion control of gas turbines, and mainly relates to a low-emission three-circuit lean-fuel premix active combustion control device and method, which are used to solve the problems caused by the unreasonable equivalent ratio of lean-fuel premix in the working process of existing gas turbines or aeroengines. Combustion instability caused by uneven fuel mixing and high pollution emissions. Background technique [0002] Due to the unreasonable equivalence ratio of lean fuel premixing in the working process of gas turbines or aero-engines, uneven fuel mixing causes combustion instability, and combustion instability leads to high combustion pollutant emissions, thereby causing environmental pollution, etc. phenomenon, and the current gas turbine control device cannot effectively suppress the problems of combustion thermoacoustic instability and high emissions. It is against this background that the present ...

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Problems solved by technology

[0003] Aiming at the problems of unreasonable lean fuel premixed equivalence ratio, uneven fuel mixing, high pollution emission, and inability to effectively suppress combustion thermoacoustic instability in the existing gas turbine or aero-engine, a new method is proposed. Low-emission three-circuit lean fuel premixing active combustion control device and method, different control modes are set in different circuits of the combustion cylinder, including fuel control mode based on premixed equivalence ratio, fuel control mode based on sound pressure phase delay and LMS-based fuel control mode

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