Modular testing device for cyclone combustion thermo-acoustic oscillation characteristic research

Abstract

The invention relates to the field of aero-engine and gas turbine basic combustion test research, and discloses a modular testing device for cyclone combustion thermo-acoustic oscillation characteristic research. The device is composed of a loudspeaker section, an air plenum chamber section, a cyclone section, a windowing combustion section and a combustion chamber lengthening section from bottomto top. After air flows through an air supply pipeline to enter a plenum chamber, through the excitation effect of a loudspeaker, after the air flows through an axial flow type cyclone, a needed soundfield environment and a needed cyclone flow field environment can be obtained. Fuel jetting at different positions can be achieved through three paths of fuel supply pipelines, and premixed combustion, diffusive combustion, the mixed mode of premixed combustion and diffusive combustion and other cyclone combustion flow field characteristics are obtained. Modular design is adopted for the testingdevice, the main functional parts can be detached and replaced, testing working condition parameters, sound field conditions and jetting positions can be flexibly adjusted, and flame passback can be avoided. A rectangular four-face windowing combustion chamber can be compatible with various kinds of advanced optical equipment, and combustion diagnosis data can be measured and obtained.

Description

technical field [0001] The invention relates to the research field of basic combustion tests of aero-engines and gas turbines, in particular to a modular test device for the research of swirl combustion thermoacoustic oscillation characteristics. Background technique [0002] At present, the world is facing increasingly serious environmental degradation problems, and countries around the world have reached a high degree of consensus on the concept of pollution source governance. Human beings' excessive consumption of fossil energy is an important reason for the current environmental pollution. Diffusion combustion is widely used in the current energy utilization field, which produces thermal nitrogen oxides (NO X ) is one of the main sources. With the increasingly stringent emission standards of gas turbines and aero engines, the huge market demand promotes the rapid development of advanced low-emission combustion organization technology. The three low-pollution combustio...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a swirl combustion thermoacoustic oscillation test device for overcoming the problems of single function, limited range of test parameters, and risk of backfire of premixed fuel in the existing technology. A modular test device for characteristic research, which can simulate the flow field characteristics of swirling combustion and the thermoacoustic oscillation characteristics of swirling combustion under premixed combustion state, diffusion combustion state and mixed combustion state, and can effectively prevent flame back propagation. Modular design, the main functional components can be replaced, and the test parameters, sound field conditions, and injection positions can be flexibly adjusted

Images