Low-pollution combustion chamber for direct injection of multi-point lean oil

Abstract

The invention discloses a low-pollution combustion chamber for direct injection of multi-point lean oil. The low-pollution combustion chamber consists of a diffuser, a combustion box, a combustion chamber head part, a flame cylinder and a combustion chamber outlet; a staged combustion policy is adopted; the combustion chamber head part is divided into an on-duty stage, a first main combustion stage and a second main combustion stage; the on-duty stage adopts a centrifugal nozzle to form a dispersion combustion mode; the main combustion stages adopt a lean oil direct injection combustion mode;and fuel nozzles in the on-duty stage, the first main combustion stage and the second main combustion stage can be independently controlled. Under the working condition of 7% of the thrust, the on-duty stage only works; under the working condition of 30% of the thrust, the on-duty stage and the first main combustion stage work at the same time; and under the working condition of 85% and 100% of the thrust, the on-duty stage, the first main combustion stage and the second main combustion stage work at the same time. Through the design, the pollutant emission and the combustion efficiency and the pollutant emission under low working conditions are preferably reduced, and the combustion efficiency under each working condition and under LTO cycle is considered.

Description

technical field [0001] The invention belongs to the field of low-pollution combustion chambers, in particular to a low-pollution combustion chamber with multi-point lean oil direct injection. Background technique [0002] In recent years, as people pay more and more attention to environmental protection issues, the environmental protection of aero-engines has become more and more prominent in the development requirements. Reducing pollution and prolonging life are the main development goals of gas turbine engines. [0003] For this reason, countries all over the world have carried out extensive research on low-pollution combustion technology, and developed different forms of low-pollution combustion chambers. For example, as early as the 1970s, the United States developed staged combustion technology, lean premixed pre-evaporation combustor (LPP), rich combustion-quenching-lean combustion technology (RQL), catalytic combustor and variable geometry combustion Chamber (VGC), ...

AI Technical Summary

Problems solved by technology

However, these technologies have their shortcomings. RQL combustion technology is difficult to ensure rapid and sufficient mixing in the middle zone, thereby reducing combustion efficiency; LPP combustion technology has problems such as tempering, spontaneous combustion, poor combustion and stable stability.

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