Radiation transfer method based on band model

A radiative transfer equation and radiative transfer technology, applied in complex mathematical operations, etc., can solve problems such as the inability to apply radiative transfer of scattering media, and achieve the effect of improving calculation accuracy

Active Publication Date: 2017-10-13
BEIJING INST OF ENVIRONMENTAL FEATURES
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Problems solved by technology

[0003] There are many methods to solve the radiative transfer, only the LOS method is easy to realize the radiative transfer calculation based on the narrowband model (combined with the CG approximation or the LS approximation), but this method cannot be applied to the radiative transfer problem of the scattering medium, and there are problems in engineering applications. certain limitations

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  • Radiation transfer method based on band model
  • Radiation transfer method based on band model
  • Radiation transfer method based on band model

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[0054] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many of the details listed in the specification are only for readers to have a thorough understanding of one or more aspects of the present invention, and these aspects of the present invention can be implemented even without these specific details.

[0055] In the radiative transfer method based on the spectral band model provided in this embodiment, the radiative transfer equation that has been discretized in space and angle is solved by using the finite volume method, and the expression of the radiative transfer equation is obtained, and then the expression is calculated based on The absorption coefficient correction of the LS approximation leads to the final expression of the radiative transfer equation. s...

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Abstract

The invention discloses a radiation transfer method based on a band model. The radiation transfer method based on the band model comprises the following steps: solving a radiation transfer equation which has been subjected to spatial dispersion and angular dispersion by using a finite volume method to obtain an expression of the radiation transfer equation; and carrying out LS-approximation-based absorption coefficient correction on the expression to obtain the final expression of the radiation transfer equation. The calculating precision can be improved effectively, and the radiation transfer method based on the band model has important significance on absorption and transmission of an uneven path and radiation transfer calculation of a scattering medium.

Description

technical field [0001] The invention relates to the aerospace field, in particular to a radiation transfer method based on a spectral band model. Background technique [0002] Participatory medium radiative transfer solution first needs to calculate the radiation characteristic parameters of the medium, usually using line-by-line calculation method, narrow-band model calculation or broadband model calculation, etc. The line-by-line calculation method has a huge amount of calculation, which is not suitable for engineering applications. The calculation accuracy of the broadband model is poor. It is usually used to calculate the full-spectrum radiation heat transfer. In the case of high engineering calculation requirements, the narrow-band model is often used for calculation. However, when the narrow-band model is applied to a gas medium with a non-uniform path, it needs to be corrected by combining CG approximation or LS approximation. [0003] There are many methods to solve...

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Application Information

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IPC IPC(8): G06F17/11
CPCG06F17/11
Inventor 朱希娟吴杰马静李霞段然
Owner BEIJING INST OF ENVIRONMENTAL FEATURES
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