Flame excited state particle radiation rate measurement method based on uniform light source

Abstract

The invention discloses a flame excited state particle radiation rate measurement method based on a uniform light source. A jet diffusion burner, an integrating sphere uniform light source, two ICCD cameras, an Edmud 34980 filter plate, an Edmud 65198 filter plate and a computer are utilized to build a test system. On the basis of OH * chemiluminescence initial images and CH * chemiluminescence initial images which are obtained by shooting jet diffusion flame generated by combustion of a jet diffusion combustor through two cameras, OH * chemiluminescence radial distribution and CH * chemiluminescence radial distribution are obtained through inverse Radon transformation, the luminous intensity of the uniform light shot by the two cameras is obtained based on the images of the uniform lightsources respectively obtained by the integrating sphere uniform light sources shot by the two cameras, the radiation rate of the OH * excited state particles is obtained based on the OH * chemiluminescence radial distribution and the luminous intensity of the uniform light source shot by the corresponding camera, and the radiation rate of the CH * excited state particles is obtained based on the CH * chemiluminescence radial distribution and the luminous intensity of the uniform light shot by the corresponding camera. The method is low in cost, simple and efficient.

Description

technical field [0001] The invention relates to the technical field of diagnosis of combustion process, in particular to a method for measuring the radiation rate of flame excited state particles based on a uniform light source. Background technique [0002] Chemiluminescence in combustion refers to the phenomenon that photons of a specific frequency are released when excited state particles excited by chemical reactions undergo radiative transitions. Since the formation of excited-state particles is mainly derived from key chemical reactions, chemiluminescence is directly related to important combustion parameters such as equivalence ratio, heat release rate, and flame structure, and can be considered as a spontaneous tracer of the combustion process. The chemiluminescence combustion diagnostic technology developed based on this does not require complex lasers and optical path arrangements, and overcomes the shortcomings of harsh requirements for the experimental environmen...

AI Technical Summary

Problems solved by technology

However, there is no relevant method for measuring the radiation rate of excited state particles in flames, and designing a method to measure the radiation rate of excited state particles in flames is a technical problem that needs to be solved urgently in this field.

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