Measurement method of flame excited state particle radiation rate based on uniform light source

Abstract

A method for measuring the radiation rate of flame excited state particles based on a uniform light source, using a jet diffusion burner, an integrating sphere uniform light source, two ICCD cameras, Edmund 34980 filters, Edmund 65198 filters and a computer to build a test system, based on two cameras shooting The initial image of OH* chemiluminescence and the initial image of CH* chemiluminescence obtained from the jet diffusion flame generated by the combustion of the jet diffusion burner, and the radial distribution of OH* chemiluminescence and the radial distribution of CH* chemiluminescence were obtained by using the inverse Radon transform. The luminous intensity of the uniform light captured by the two cameras is obtained based on the images of the uniform light source obtained by shooting the integrating sphere uniform light source respectively by the two cameras. Based on the radial distribution of OH* chemiluminescence and the luminous intensity of the uniform light source captured by the corresponding camera, the radiation rate of OH* excited state particles is obtained, and the CH* excitation is obtained based on the radial distribution of CH* chemiluminescence and the luminous intensity of the uniform light captured by the corresponding camera The radiation rate of the particles in the state. The invention 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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