A Simultaneous Reconstruction Algorithm of Three-dimensional Flame Temperature and Soot Volume Fraction Distribution

A technology of three-dimensional temperature and volume fraction, applied in radiation pyrometry, sensing radiation from gas/flame, optical radiation measurement, etc. Low algorithm accuracy and other issues, to achieve good global search characteristics, improve search efficiency, and easy to implement
CN112268622BActive Publication Date: 2021-12-24SOUTHEAST UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTHEAST UNIV
Publication Date
2021-12-24

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Abstract

The invention discloses a simultaneous reconstruction algorithm of three-dimensional flame temperature and soot volume fraction distribution, comprising the following steps: inputting the radiation intensity information of the outgoing spectrum of flame radiation light in different directions, discrete flame microelements, and establishing a flame radiation transfer equation; Determine the objective function, use the constructed simultaneous reconstruction algorithm for iterative calculation, and reconstruct the three-dimensional temperature and soot volume fraction distribution of the flame. In the iterative process of the algorithm of the invention, the non-negative least square algorithm is embedded in the simulated annealing algorithm, so that the search efficiency of the SA algorithm is significantly improved in the process of searching the objective function. At the same time, because the SA algorithm has the advantages of high quality, strong initial value robustness, general and easy implementation, etc., the NNLS‑SA algorithm has good global search characteristics and is not easy to fall into the local optimal value. It has higher precision and better convergence in the process of number distribution.
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Description

technical field

[0001] The invention relates to a simultaneous reconstruction algorithm of three-dimensional temperature of flame and volume fraction distribution of soot, and belongs to the technical field of flame temperature measurement. Background technique

[0002] The combustion process is an extremely complex process in which physical and chemical changes are coupled and interacted with each other. The spatial distribution of temperature, soot volume fraction and other related products in the combustion flame is directly related to the safety, effectiveness and cleanliness of the energy conversion and utilization process. Significance.

[0003] In recent years, the development of laser, optoelectronics and information technology has greatly promoted the in-depth research and application of non-contact temperature measurement technology. Non-contact temperature measurement technology has the advantage of not disturbing the flow field to be measured, and can be roughl...

Claims

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