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Method, system, storage medium and equipment for measuring radiation transfer characteristics of high-temperature gas

A technology of radiation transfer and measurement method, applied in the field of target characteristics and thermal radiology, can solve problems such as difficulty in taking into account accuracy and efficiency, time-consuming solution, etc., to achieve the effect of ensuring calculation accuracy and improving calculation efficiency

Pending Publication Date: 2022-05-24
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The amount of data for these parameters is very large, and there are often tens of thousands of spectral lines for molecular spectra, so the solution is very time-consuming
The various methods currently developed are approximations to the gas characteristics in a certain spectral interval at different levels, and it is often difficult to take into account the dual effects of accuracy and efficiency.

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  • Method, system, storage medium and equipment for measuring radiation transfer characteristics of high-temperature gas
  • Method, system, storage medium and equipment for measuring radiation transfer characteristics of high-temperature gas
  • Method, system, storage medium and equipment for measuring radiation transfer characteristics of high-temperature gas

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Experimental program
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Effect test

Embodiment 1

[0095] At present, relevant researches on high-resolution spectral databases of common types of gases and calculation models of radiation characteristic parameters already exist. However, with the development of aerospace technology, due to the complexity of the spatial background of radiation sources, it is necessary to obtain as much and accurate information as possible. At the same time, fast speed and low complexity are required in electronic countermeasures, and it is difficult for conventional models to take into account accuracy and efficiency in the full spectral range. The invention researches and discusses the optimization method for calculating the radiation transfer characteristic of high temperature gas. The invention aims to establish a multi-width spectral band K distribution model, optimize the gas radiation characteristic parameter database, and realize flexible and accurate prediction of the radiation transmission characteristic parameters through a three-dime...

Embodiment 2

[0109] The optimized high-temperature gas radiation transfer characteristic calculation method of the present invention is the same as that in Embodiment 1. The first step to obtain accurate gas radiation characteristic parameters (absorption coefficient) spectral lines includes the following steps:

[0110]2.1) Calculate the spectral line intensity S in the non-standard state σ (P,T): For temperature T and pressure P, the intensity S of the spectral line at wavenumber σ σ (P,T) can be expressed as:

[0111]

[0112] Among them, the pressure P in the standard state 0 =1.01325×10 5 Pa, temperature T 0 =296K; Planck's constant h=6.63×10 -34 J s, the speed of light c=3×10 8 m / s, Boltzmann constant k=1.3806505×10 -23 J / K; S σ (P 0 ,T 0 ) is the line strength in the standard state, unit: cm -2 , the spectral databases HITRAN, HITEMP and CDSD provide the line intensity S of a single molecule at wavenumber σ σ,M (P 0 ,T 0 ), unit: cm -1 / (molecule cm -2 ), where S ...

Embodiment 3

[0127] The optimized high-temperature gas radiation transfer characteristic calculation method of the present invention is the same as that of Embodiment 1 to Embodiment 2. The statistical and accurate gas radiation characteristic parameter spectral line trend described in the second step includes the following steps:

[0128] 3.1) Calculate the average absorption coefficient of the absorption coefficient spectral line at the wavenumber σ Enter the exact gas absorption coefficient spectral line k(σ) and unit bandwidth Δσ, generally 0.5-2cm -1 Between, the present invention takes 1cm -1 . The spectral line is divided into multiple small narrow bands along the wavenumber σ direction with Δσ as the unit, and a single small narrow band is used as the minimum calculation unit, and the average absorption coefficient at the center wave number σ Calculated as follows:

[0129]

[0130] 3.2) Calculate the fitting slope k'(σ) of the absorption coefficient spectral line at the wa...

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Abstract

The invention belongs to the technical field of target characteristics and thermal radiation, and discloses a high-temperature gas radiation transmission characteristic determination method and system, a storage medium and equipment, and the high-temperature gas radiation transmission characteristic determination method comprises the following steps: (1) obtaining accurate gas radiation characteristic parameters; establishing a multi-width spectrum band K distribution model; (2) calculating optimized gas radiation characteristic parameters; (3) establishing an optimized gas radiation characteristic parameter database; (4) accurately predicting gas radiation transmission characteristic parameters under given conditions; and (5) calculating the emission intensity of radiation transmission. According to the method, by establishing the accurate and efficient radiation characteristic parameter calculation model and accurately predicting the radiation transfer characteristic parameters, the solution of the radiation transfer equation is optimized, the problem that precision and efficiency cannot be considered when radiation transfer is calculated by a traditional spectral band model is solved, and a new thought is provided for calculation of high-temperature gas radiation transfer characteristics.

Description

technical field [0001] The invention belongs to the technical field of target characteristics and thermal radiation, and in particular relates to a method, system, storage medium and equipment for measuring radiation transmission characteristics of high temperature gas. Background technique [0002] At present, radiation heat transfer plays a dominant role in high temperature flow fields, and rapid and reliable measurement or calculation of radiation transfer characteristics of radiation sources is the premise of thermal performance analysis and target detection. The calculation of radiation transfer characteristics mainly involves three aspects: accurate gas radiation spectral line data, efficient radiation characteristics calculation model and accurate multi-dimensional space radiation transfer equation solution method. Due to the huge number of gas radiation spectral lines and the complex environmental background conditions, the calculation difficulty is greatly increased...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F119/02G06F119/08
CPCG06F30/20G06F2119/08G06F2119/02Y02E60/00
Inventor 石磊李芳艳姚博张玉玥杜悦帆李小平
Owner XIDIAN UNIV