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이산화탄소-수증기 혼합가스에 대한 파장별 회색가스가중합법에서 회색가스재조합에 대한 연구Study on Regrouping of Gray Gases in spectral WSGGM for Arbitrary Mixtures of CO2 and H2O Gases
- Issue Date
- 2003
- Publisher
- 대한기계학회
- Keywords
- Radiation(복사); WSGGM(회색가스가중합법); Transmissivity(통과율); Gas Mixture(혼합가스); Gray Gas Regrouping(회색가스 재조합); Overlapping Band(겹침밴드)
- Citation
- 대한기계학회논문집 B, v.27, no.2, pp 1 - 9
- Pages
- 9
- Journal Title
- 대한기계학회논문집 B
- Volume
- 27
- Number
- 2
- Start Page
- 1
- End Page
- 9
- ISSN
- 1226-4881
- Abstract
- The WSGG-based narrow band model was employed to solve the radiative transfer equations along isothermal and non-isothermal paths through CO2-H2O-N2 gas mixtures at 1 atm. When the WSGGM is applied for arbitrary gas mixtures by considering the multiplication property of transmissivity in overlapping bands, the number of gray gases is significantly increased. To reduce the computation time, three different regrouping methods for the gray gases are tested in obtaining the mean absorption coefficient for each gray gas group. Among them, the regrouping method by minimizing the regrouping error shows the best results. For the isothermal media, 10 gray gases show fairly good agreement with the results by statistical narrow band(SNB) model which are regarded as reference solutions. For non-isothermal media, 20 gray gases show good agreement with reference solutions.
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