Quantitative 2-D OH thermometry using spectrally resolved planar laser-induced fluorescence.
Opt Lett
; 44(3): 578-581, 2019 Feb 01.
Article
en En
| MEDLINE
| ID: mdl-30702683
ABSTRACT
A novel method is presented for quantitative two-dimensional temperature measurement in combustion gases. This method, namely spectrally resolved planar laser-induced fluorescence thermometry, utilizes a high-power, wavelength-tunable and narrow-linewidth CW laser to access the spectral lineshapes of a key combustion intermediate, the hydroxyl radical (OH), and enables high-fidelity and calibration-free quantification of non-uniform temperature fields in complex reacting flows. Specifically, the R1(11)/R1(7) line pair of the OH A2Σ+-X2Π(0,0) rovibronic band was probed with laser radiation near 306.5 nm, and their fluorescence ratios were used to infer temperature. Preliminary demonstrations of this thermometry method were performed in a series of burner-stabilized CH4-air flames.
Texto completo:
1
Banco de datos:
MEDLINE
Idioma:
En
Año:
2019
Tipo del documento:
Article