Spatial investigation of plasma emission from laminar diffusion methanol, ethanol, and n-propanol alcohol flames using LIBS method

Application of Molecular Emissions in Laser-Induced Breakdown Spectroscopy: A Review

“…CH molecular emissions are common from the core of the combustion zone. CH emission can be directly released and formed by carbon and hydrogen species [25].…”

“…Molecular emissions of combustion intermediates can indicate the flame's structure and burning quality. Ghezelbash et al [25] investigated the CH, CH*, C 2 , and CO molecular emissions in different areas in the laminar diffusion of methanol, ethanol, and n-propanol alcohol flames. The strong molecular emissions of CH and CH* were from the blue zones (with low combustion quality).…”

Flame Temperature Measurement Based on Laser-Induced Breakdown Spectroscopy and Element Doping

“…The results are as follows (13) where ε is the effective spectral emissivity of the equivalent blackbody radiation source; τ air , τ redc , and τ lens are the spectral transmittance of the atmospheric environment, attenuator, and optical components, respectively; and ε e is the spectral emissivity of the external atmospheric environment.…”

“…12 Professor Ghezelbash's team from Malek Ashtar University of Technology in Iran used LIBS to analyze the temperature field of different types of laminar diffusion flames; they divided the flame area according to height information and obtained the excitation spectral properties of characteristic elements and groups in different areas of the flame. 13 With regard to the thermal and optical radiation emission of medium particles in the temperature field, Professor Zhou et al conducted a detailed analysis combining spectral analysis and radiation temperature measurement technology. According to the overall spectral characteristics of the flame temperature field, strong emission lines of alkali metal elements were reasonably avoided, and the radiation transfer model was simplified.…”

“…Thus, a flame radial temperature distribution and gas molecular absorption coefficient distribution were obtained via TDLAS, and the variation law of molecular concentration under different equivalence ratios was explored via LIBS . Professor Ghezelbash’s team from Malek Ashtar University of Technology in Iran used LIBS to analyze the temperature field of different types of laminar diffusion flames; they divided the flame area according to height information and obtained the excitation spectral properties of characteristic elements and groups in different areas of the flame . With regard to the thermal and optical radiation emission of medium particles in the temperature field, Professor Zhou et al conducted a detailed analysis combining spectral analysis and radiation temperature measurement technology.…”