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In Situ Determination of the Equivalence Ratio in a Methane/air Flow Field by Femtosecond Filament Excitation by Hongwei Zang; Danwen Yao; Siqi Wang; Yao Fu; Wei Zhang; Shanming Chen; Helong Li; Huailiang Xu is a Physics and Astronomy article available to read on EtoBox.
What is In Situ Determination of the Equivalence Ratio in a Methane/air Flow Field by Femtosecond Filament Excitation about?
The equivalence ratio is a key parameter in understanding pyrolysis, combustion and gasification of fuels for improving combustion efficiency and lowering net pollution emissions. In this study, we investigate the feasibility of measuring the local equivalence ratio in a gaseous flow field using femtosecond filament excitation. We demonstrate that quasi-collimated-beam-induced filamentation in a premixed methane/air flow can produce a long and uniform free-of-atomic-line emission channel, and that the intensity ratios of the molecular emissions in this channel, such as methylidyne radical (CH) (331 nm)/N 2 (337 nm), CH (331 nm)/N 2 (357 nm), and CH (331 nm)/CN (388 nm), are all linear correlations to the equivalence ratios of the methane/air flow. Our results provide a possibility for the in situ measurement of long-range and multi-dimensional equivalence ratio of flow fields with femtosecond filament excitation.
Who reads In Situ Determination of the Equivalence Ratio in a Methane/air Flow Field by Femtosecond Filament Excitation?
It is typically read by researchers, students, and practitioners in Physics and Astronomy.
- Author
- Hongwei Zang; Danwen Yao; Siqi Wang; Yao Fu; Wei Zhang; Shanming Chen; Helong Li; Huailiang Xu
- Publisher
- Springer; IOP Publishing; Institute of Physics Publishing; Pleiades Publishing Ltd (ISSN 1054-660X)
- Published
- 2020
- Language
- EN
- Field
- Physics and Astronomy (Physical Sciences)