Flame temperature distribution reconstruction method based on complex permittivity model

By constructing a complex permittivity model of a flame that considers both positive ions and electrons, and using a complex capacitance tomography system to obtain the relative permittivity and conductivity of the flame, a temperature distribution model is established. This solves the problem of large measurement errors in flame temperature in existing technologies, and achieves higher measurement accuracy and theoretical basis.

CN116625537BActive Publication Date: 2026-02-06TIANJIN UNIV
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Patent Information

Application Number
CN202310668785.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-06-07
Publication Date
2026-02-06
Estimated Expiration
2043-06-07

AI Technical Summary

Technical Problem

Existing flame temperature measurement methods, based on mapping relationships from experimental data, have limited applicability and do not fully consider the contributions of positive ions and electrons to the complex permittivity of the flame, resulting in large errors and a lack of theoretical basis.

Method used

A complex permittivity model of a flame based on positive ions and electrons was constructed. The relative permittivity and conductivity of the flame were obtained using a complex capacitance tomography system. By establishing a model relating the relative permittivity and conductivity to temperature, the flame temperature distribution was numerically calculated.

Benefits of technology

It improves the accuracy and theoretical basis of flame temperature measurement, reduces measurement errors, and achieves accurate reconstruction of flame temperature distribution.

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Abstract

The present application relates to a kind of flame temperature distribution reconstruction methods based on complex dielectric constant model, comprising the following steps: first, the relationship model between relative dielectric constant ε r And conductivity σ With flame thermodynamic temperature T It is constructed;Second, a plurality of groups of flame different positions relative dielectric constant, conductivity and temperature data are collected, and the coefficient in the relationship model is determined;Third, the relative dielectric constant and conductivity distribution of flame are obtained using complex value capacitance tomography system, and the temperature of flame is calculated based on the relationship model to reconstruct the temperature distribution of flame.
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