Theoretical study of near-infrared absorption spectra

T. S. Cheng, C. Y. Wu, Y. C. Chao

Research output: Contribution to journalArticlepeer-review


Diode-laser based absorption spectroscopy can provide non-intrusive, line-of-sight absolute measurements of multiple flow parameters. An accurate prediction of absorption spectra is essential for extracting species concentrations and temperature in combustion gases using a diode-laser based absorption spectroscopy. In the present study, high-resolution absorption spectra of CO2, CO, O2, H2O, and CH4 in the near-infrared (IR) region are numerically simulated to understand their spectral structures. The calculated spectra are compared with reported experimental data under various temperature and pressure conditions to assess the numerical models. Results demonstrate that the present simulations can excellently reproduce the measured spectra, and the developed numerical models can be utilized for future combustion emission measurements.

Original languageEnglish
Pages (from-to)233-240
Number of pages8
JournalHangkong Taikong ji Minhang Xuekan/Journal of Aeronautics, Astronautics and Aviation
Volume38 A
Issue number4
Publication statusPublished - 2006 Dec 1

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Space and Planetary Science


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