灰气体加权和模型的发展综述

Development of Weighted-Sum-of-Gray-Gases Model

气体辐射特性的准确计算对辐射换热过程的分析有重要影响。国内外学者对气体辐射特性模型中的灰气体加权和模型(WSGG)和与k分布法相关的模型进行了大量研究,本文对WSGG模型发展现状以及存在的问题进行了总结分析。针对WSGG模型具有效率高、精度低的特点,而k分布法精度高可以弥补其不足,认为可以将k分布法引入WSGG模型,建立一种快速准确且能与任意辐射传递方程求解方法兼容的气体辐射特性计算模型。

Accurate calculation of gas radiation characteristics has an important influence on analysis of whole radiation heat transfer process.Scholars at home and abroad have done a lot of research on Weighted-Sum-of-Gray-Gases(WSGG)model and the models related to k-distribution method in gas radiation characteristic model.In this paper,the development status and existing problems of WSGG model are summarized and analyzed.In view of high efficiency and low accuracy of WSGG model,and the fact that the high accuracy of k-distribution method can make up for its shortcomings,it is considered that k-distribution method can be introduced into WSGG model to establish a fast and accurate gas radiation characteristic model which can be compatible with any methods of solving the radiation transfer equation.