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Flame temperature and soot concentration distribution simultaneous reconstruction method and device and storage medium

A technology of flame temperature and concentration distribution, applied in measurement devices, radiation pyrometry, sensing radiation from gas/flame, etc. The effect of improving reconstruction accuracy and good convergence

Pending Publication Date: 2022-02-15
SOUTHEAST UNIV +1
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Problems solved by technology

However, this simple assumption about the spectral absorption characteristics of soot does not conform to the actual spectral absorption characteristics of soot, which will cause large reconstruction errors

Method used

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  • Flame temperature and soot concentration distribution simultaneous reconstruction method and device and storage medium
  • Flame temperature and soot concentration distribution simultaneous reconstruction method and device and storage medium
  • Flame temperature and soot concentration distribution simultaneous reconstruction method and device and storage medium

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Embodiment Construction

[0085] Below, the present invention will be further described in conjunction with accompanying drawing and specific embodiment:

[0086] figure 2A preset flame section is shown. Flame temperature T(K) and flame soot concentration f v (ppm) is non-uniformly distributed on the flame section, and the radius of the flame section is 4mm. The hyperspectral imaging device collects the spectral radiation intensity emitted by the flame section, the spectral range is between 550nm and 850nm, and the interval between spectral channels is 4nm, with a total of 76 spectral channels. The size of each pixel of the hyperspectral image sensor is 7 μm (H) × 7 μm (V), and the distance from the center of the target flame section is 750 mm. The center of the flame is in the same plane as the center of the image sensor.

[0087] Calculate the spectral radiation intensity I of each part of the flame according to formula (1) bλ and absorption coefficient k λ :

[0088] I bλ =C 1 lambda -5 / ...

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Abstract

The invention discloses a flame temperature and soot concentration distribution simultaneous reconstruction method and device and a storage medium. The reconstruction method comprises the following steps: 1) dividing flame infinitesimal bodies; establishing a flame spectral radiation transfer equation according to the collected flame hyperspectral radiation information; and 2) designing a target function, iteratively updating the temperature and soot concentration of each infinitesimal body of the flame according to a reconstruction algorithm until convergence, and reconstructing flame temperature distribution and soot concentration distribution. According to the reconstruction method, the flame self-absorption effect does not need to be ignored, the temperature and soot concentration initial value of each infinitesimal body does not need to be specified, and the robustness is high; and when the input radiation intensity error of the radiation light is large, the algorithm can still keep good flame temperature distribution and soot concentration distribution reconstruction precision.

Description

technical field [0001] The invention relates to a flame temperature and soot concentration distribution reconstruction method based on hyperspectral radiation information, and belongs to the technical field of flame temperature measurement. Background technique [0002] Combustion is a space-time multidimensional interaction of chemical reactions coupling mass, momentum and energy transport processes. In the flame, the formation of soot (Soot) is one of the most complex phenomena in the combustion process, and the combustion efficiency, heat transfer and heat transfer of the flame are closely related to the formation of soot. Accurate and reliable diagnosis of flame basic thermodynamic parameters such as temperature and soot concentration will help to understand the formation and oxidation mechanism of soot, thereby revealing the nature of combustion phenomena and the law of the combustion process, improving energy utilization efficiency and reducing pollution emissions. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J5/00G01N15/06
CPCG01J5/0014G01N15/06
Inventor 许传龙黄益智王长健仪建华张彪
Owner SOUTHEAST UNIV
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