Dongsheng Qu, Yanji Hong, Guangyu Wang, Mingdong Wang. Measurement Method for Gas Parameters in Combustion Flow Based on Spectroscopy Fitting[J]. Acta Optica Sinica, 2017, 37(12): 1230001
- Acta Optica Sinica
- Vol. 37, Issue 12, 1230001 (2017)
Fig. 1. Fitting flow chart for harmonic signal based on WMS
Fig. 2. Variation of sensitivity δA of 2f/1f spectra to integrated absorbance A with A
Fig. 3. Variations of simulated normalized 2f/1f spectra with collisional width Δvc
Fig. 4. Variation of sensitivity δΔvc of 2f/1f spectrum to collisional width Δvc with Δvc
Fig. 5. Diagram of experimental setup
Fig. 6. Detected signal under the conditions of pressure of 101.325 kPa, temperature of 1000 K, and vapour mole fraction of 6.53%
Fig. 7. Updating processes of (a) A and (b) ΔvD or Δvc of two spectral lines
Fig. 8. Comparison of simulated and experimental 2f/1f signals of two spectral lines after fitting. (a) Spectral line 1; (b) spectral line 2
Fig. 9. (a) Measured temperature and vapour mole fraction at pressure of 101.325 kPa; (b) measured pressure and vapour mole fraction at temperature of 1000 K
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Table 1. Partial spectrum parameters of spectral lines with frequencies of 7185.60 cm-1 and 7454.45 cm-1
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