The use of molecular spectra simulation for diagnostics of reactive flows

• Main Author: Passaro, Angelo
• Publication Date: 2011
• Other Authors: Carinhana, Dermeval, Gonçalves, Enizete Aparecida, da Silva, Marcio Moreira, Guimarães, Ana Paula Lasmar [UNESP], Abe, Nancy Mieko, dos Santos, Alberto Monteiro
• Format: Article
• Language: eng
• Source: Repositório Institucional da UNESP
• Download full: http://dx.doi.org/10.5028/jatm.2011.03019610; http://hdl.handle.net/11449/72271
• topic: Combustion control; Computer programs; Computerized simulation; Optical emission spectra; Rotational spectra; Aerospace applications; Combustion; Computer simulation languages; Emission spectroscopy; Flow visualization; Mass spectrometry; Molecular spectroscopy; Probes; Program diagnostics; Statistical methods; Computer software

The C 2 * radical is used as a system probe tool to the reactive flow diagnostic, and it was chosen due to its large occurrence in plasma and combustion in aeronautics and aerospace applications. The rotational temperatures of C 2 * species were determined by the comparison between experimental and theoretical data. The simulation code was developed by the authors, using C++ language and the object oriented paradigm, and it includes a set of new tools that increase the efficacy of the C 2 * probe to determine the rotational temperature of the system. A brute force approach for the determination of spectral parameters was adopted in this version of the computer code. The statistical parameter c 2 was used as an objective criterion to determine the better match of experimental and synthesized spectra. The results showed that the program works even with low-quality experimental data, typically collected from in situ airborne compact apparatus. The technique was applied to flames of a Bunsen burner, and the rotational temperature of ca. 2100 K was calculated.