Method for simultaneously measuring distribution of high-temperature gas two-dimensional transient temperature field and concentration field based on hyper spectrum

A transient temperature field, high temperature gas technology, applied in the field of infrared laser absorption spectroscopy, can solve the problems of difficult concentration real-time online monitoring, low efficiency, gas interference reaction, etc.

Active Publication Date: 2014-02-05
SOUTHEAST UNIV
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Problems solved by technology

[0008] Traditional gas concentration detection technologies include manual sampling and continuous sampling. Manual sampling methods (such as chemical analysis, gas chromatography, etc.) require manual sampling and experimental analysis of gases, and can only detect and analyze single components one by one. Therefore, the Method is less efficient and highly dependent on operator analytical skills
The continuous sampling method commonly used analytical instruments such as ultraviolet light and thermal conductivity, which are composed of two parts: a sampl

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  • Method for simultaneously measuring distribution of high-temperature gas two-dimensional transient temperature field and concentration field based on hyper spectrum
  • Method for simultaneously measuring distribution of high-temperature gas two-dimensional transient temperature field and concentration field based on hyper spectrum
  • Method for simultaneously measuring distribution of high-temperature gas two-dimensional transient temperature field and concentration field based on hyper spectrum

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[0033] Below in conjunction with accompanying drawing, the present invention will be further described

[0034] The present invention provides a method for simultaneous measurement of two-dimensional transient temperature field and concentration field distribution of high-temperature gas based on hyperspectral, and the specific implementation steps are as follows:

[0035] 1) According to the spatial resolution requirements of gas component concentration and temperature, the two-dimensional area to be measured (assumed to be a rectangular area of ​​L×D) is discretized and divided into M×N grids, each grid Corresponding to a temperature and a concentration to be measured respectively, the total number of to be measured is 2×M×N;

[0036]2) According to the number of values ​​to be measured, select one water vapor characteristic absorption line with appropriate line intensity and low state energy level from the HITRAN database, where , and extract the central wavelength λ of e...

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Abstract

The invention discloses a method for simultaneously measuring distribution of a high-temperature gas two-dimensional transient temperature field and concentration field based on a hyper spectrum, and belongs to the technical field of laser absorption spectrums. The method comprises the steps that a laser array is distributed on a high temperature area to be measured, hyper spectrum scanning is carried out on the area to be measured, an area temperature field and a vapor concentration field are measured through the spectral absorption of vapor characteristic spectral lines, and meanwhile the distribution of a gas concentration field is measured through the characteristic spectrum absorption of other gas. Grid scattering is carried out on the area to be measured in measurement, laser beams are distributed on the rows and columns of a grid respectively, broadband spectrum scanning is carried out on the characteristic spectral line of gas to be measured, and the inversion of the temperature field and the gas composition concentration field is achieved through a spectrum absorption rate obtained through the scanning with the help of an intelligent optimization algorithm.

Description

technical field [0001] The invention relates to the field of infrared laser absorption spectroscopy, in particular to a method for simultaneously measuring two-dimensional transient temperature field and concentration field distribution of high-temperature gas based on hyperspectral. Background technique [0002] Temperature is an important parameter in chemical reactions and industrial processes. The measurement of the temperature field, especially the effective and accurate monitoring of the temperature and component concentration fields in the combustion process, is the key to improving combustion efficiency, controlling pollution emissions, studying combustion mechanisms, and developing A decisive condition for an efficient burner. [0003] At present, temperature measurement is mainly divided into two categories: contact and non-contact measurement methods. [0004] Contact measurement: For the measurement of combustion flame temperature, various types of thermocouples...

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Application Information

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IPC IPC(8): G01D21/02
Inventor 周宾李根李剑肖睿
Owner SOUTHEAST UNIV
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