| タイトル | Fan Beam Emission Tomography for Estimating Scalar Properties in Laminar Flames |
| 本文（外部サイト） | http://hdl.handle.net/2060/20030053454 |
| 著者（英） | Lim, Jongmook; Sivathanu, Yudaya; Feikema, Douglas |
| 著者所属（英） | NASA Glenn Research Center |
| 発行日 | 2003-04-01 |
| 言語 | eng |
| 内容記述 | A new method of estimating temperatures and gas species concentrations (CO2 and H2O) in a laminar flame is reported. The path-integrated, spectral radiation intensities emitted from a laminar flame at multiple wavelengths and view angles are calculated using a narrow band radiation model. Synthetic data, in the form of radial profiles of temperature and gas concentrations, are used in these calculations. The calculations mimic measurements that would theoretically be obtained using a mid-infrared spectrometer with a scanner. The path integrated spectral radiation intensities are deconvoluted using a maximum likelihood estimation method in conjunction with an iterative scheme. The deconvolution algorithm accounts for the self-absorption of radiation by the intervening gases, and provides the local temperature and gas species concentrations. The deconvoluted temperatures and gas concentrations are compared with the synthetic data used for calculating the spectral radiation intensities. The deconvoluted temperatures and gas species concentrations are within 0.5 % of the synthetic data. The deconvolution algorithm is expected to provide combustion researchers with an easy method of obtaining the radial profiles of major gas species concentrations and temperatures in laminar flames non-intrusively using a mid-infrared spectrometer with a scanner. |
| NASA分類 | Fluid Mechanics and Thermodynamics |
| レポートNO | NAS 1.15:212302
E-13873
NASA/TM-2003-212302 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/64505 |
