Femtosecond laser-induced cyano chemiluminescence in methane-seeded nitrogen gas flows for near-wall velocimetry

Li, Bo; Zhang, Dayuan; Li, Xiaofeng; Gao, Qiang; Zhu, Zhifeng; Li, Zhongshan

doi:10.1088/1361-6463/aacc97

Cited by 10 publications

(2 citation statements)

References 24 publications

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“…CH radicals and H radicals are two active components, and their generation processes involve multiple chemical reaction paths, which are related to both CH 4 and air in the mixture [29]. The generation process of CN radical is complicated, involving a variety of chemical reactions related to CH 4 and N 2 [30,31].…”

Section: Componentmentioning

confidence: 99%

Equivalence Ratio Measurements in CH4/Air Gases Based on the Spatial Distribution of the Emission Intensity of Femtosecond Laser-Induced Filament

Zhang

et al. 2021

Processes

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Femtosecond lasers have been used in combustion diagnostics. Based on the characteristics of femtosecond laser filamentation, many diagnostic techniques have been developed. Here, we propose a method, based on femtosecond laser filamentation, for equivalence ratio measurements in CH4/air gases. By measuring the spatially resolved spectra of the femtosecond laser-induced filament, we found that the variation of the equivalence ratio in the flow field would affect the spatial distribution of the emission intensity of femtosecond laser-induced filament. On this basis, the equivalence ratio was calibrated by using the relative spatial positions of N2 (337 nm) and C2 (516.5 nm) signals in the filament. This method overcomes the interference of local air disturbance, having lower measurement uncertainty.

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Section: Componentmentioning

confidence: 99%

Equivalence Ratio Measurements in CH4/Air Gases Based on the Spatial Distribution of the Emission Intensity of Femtosecond Laser-Induced Filament

Zhang

et al. 2021

Processes

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“…Another fs-laser-based tagging velocimetry is femtosecond laser-induced cyano chemiluminescence (FLICC) [166], which is proposed by our group. When an fs laser focused at methane-seeded nitrogen gas flows, the high-intensity emission originating from CN ( B 2 Σ + → X 2 Σ + ) fluorescence was observed.…”

Section: Tagging Velocimetry Based On Femtosecond Laser-induced Emissionmentioning

confidence: 99%

A Review of Femtosecond Laser-Induced Emission Techniques for Combustion and Flow Field Diagnostics

Zhang

Liu

et al. 2019

Applied Sciences

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The applications of femtosecond lasers to the diagnostics of combustion and flow field have recently attracted increasing interest. Many novel spectroscopic methods have been developed in obtaining non-intrusive measurements of temperature, velocity, and species concentrations with unprecedented possibilities. In this paper, several applications of femtosecond-laser-based incoherent techniques in the field of combustion diagnostics were reviewed, including two-photon femtosecond laser-induced fluorescence (fs-TPLIF), femtosecond laser-induced breakdown spectroscopy (fs-LIBS), filament-induced nonlinear spectroscopy (FINS), femtosecond laser-induced plasma spectroscopy (FLIPS), femtosecond laser electronic excitation tagging velocimetry (FLEET), femtosecond laser-induced cyano chemiluminescence (FLICC), and filamentary anemometry using femtosecond laser-extended electric discharge (FALED). Furthermore, prospects of the femtosecond-laser-based combustion diagnostic techniques in the future were analyzed and discussed to provide a reference for the relevant researchers.

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One-dimensional full-range mixture fraction measurements with femtosecond laser-induced plasma spectroscopy

Zhang

Gao

et al. 2020

Exp Fluids

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Femtosecond laser-induced cyano chemiluminescence in methane-seeded nitrogen gas flows for near-wall velocimetry

Cited by 10 publications

References 24 publications

Equivalence Ratio Measurements in CH4/Air Gases Based on the Spatial Distribution of the Emission Intensity of Femtosecond Laser-Induced Filament

Equivalence Ratio Measurements in CH4/Air Gases Based on the Spatial Distribution of the Emission Intensity of Femtosecond Laser-Induced Filament

A Review of Femtosecond Laser-Induced Emission Techniques for Combustion and Flow Field Diagnostics

One-dimensional full-range mixture fraction measurements with femtosecond laser-induced plasma spectroscopy

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