A method for engineering prediction of visible light band radiation characteristics

By calculating the radiation characteristics of high-temperature gases, the problem of interference of high-temperature gas radiation on star sensors in star navigation was solved, achieving efficient and accurate light environment prediction and supporting the design of star navigation technology.

CN122132662APending Publication Date: 2026-06-02BEIJING LINJIN SPACE AIRCRAFT SYST ENG INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING LINJIN SPACE AIRCRAFT SYST ENG INST
Filing Date
2026-02-12
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

In star navigation technology, high-temperature gas radiation can interfere with star sensors, making it difficult to identify star points. In severe cases, it can cause star sensors to saturate and malfunction.

Method used

A method for predicting the radiation characteristics of high-temperature gases applicable to the visible light band is established. By calculating the reference flow field, gas absorption coefficient, blackbody radiation intensity, and radiative flux within the field of view, the radiation characteristics of high-temperature gases can be accurately predicted.

Benefits of technology

It enables efficient and accurate prediction of high-temperature gas light environments, supports the design of starlight navigation technology, and improves navigation accuracy and equipment reliability.

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Abstract

An engineering prediction method for visible light radiation characteristics is proposed. First, for a hypersonic vehicle, a typical state is selected, and thermochemical nonequilibrium flow field calculations are performed. The flow field is sufficiently large to cover all high-temperature flow fields within the observation direction. Then, based on the flow field calculation results, information such as the observation direction, observation field angle, and observation band is set, and the light radiation intensity is calculated using the radiation characteristic engineering prediction method. This invention addresses the problems of low accuracy and difficulty in engineering application of high-temperature gas radiation characteristic prediction in the thermochemical nonequilibrium region by establishing an engineering prediction method for high-temperature gas radiation characteristics applicable to the visible light band based on thermochemical nonequilibrium flow fields.
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