A novel single-pixel imaging method for two-dimensional soot volume fraction measurements in axisymmetric flames

IF 5.8 2区工程技术 Q2 ENERGY & FUELS

Combustion and Flame Pub Date : 2025-02-01 DOI:10.1016/j.combustflame.2024.113902

Qianlong Wang , Siming Xiong , Zilin Deng , Guillaume legros , Haifeng Liu , Zibang Zhang

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引用次数: 0

Abstract

This paper initially utilizes a Fourier single-pixel imaging (FSI) optical method to measure the soot volume fraction (

f_{v}

) field in flames, which is based on the theorems of Fourier transform and Beer-Lambert law. Unlike the conventional two-dimensional sensor used for imaging, a spatially unresolvable detector, such as a photomultiplier tube (PMT), is utilized to reconstruct flame images. The current prototype optical measurement system is detailed and further validated by a proof-of-concept experiment on a benchmark laminar diffusion flame. It is found that the sample rate and the loop number significantly affect the quality of flame image reconstruction, and it is recommended to use thresholds of 25 % and 20 for these two parameters. In addition, the maximum standard deviation

f_{v}

of 0.025, as calculated through error propagation in five repeated experiments, demonstrates the robustness of the FSI technique. Nevertheless, the present optical layout could be further optimized in terms of improving the quality of reconstructed images, shortening the sampling duration, and replacing the near-infrared light source to achieve more precise

f_{v}

distributions and reduce uncertainties. Moreover, the potential for single-shot resolution improvements deserves further investigation of temporal flame measurements in the near future.

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来源期刊

Combustion and Flame 工程技术-工程：化工

CiteScore

9.50

自引率

20.50%

发文量

631

审稿时长

3.8 months

期刊介绍： The mission of the journal is to publish high quality work from experimental, theoretical, and computational investigations on the fundamentals of combustion phenomena and closely allied matters. While submissions in all pertinent areas are welcomed, past and recent focus of the journal has been on: Development and validation of reaction kinetics, reduction of reaction mechanisms and modeling of combustion systems, including: Conventional, alternative and surrogate fuels; Pollutants; Particulate and aerosol formation and abatement; Heterogeneous processes. Experimental, theoretical, and computational studies of laminar and turbulent combustion phenomena, including: Premixed and non-premixed flames; Ignition and extinction phenomena; Flame propagation; Flame structure; Instabilities and swirl; Flame spread; Multi-phase reactants. Advances in diagnostic and computational methods in combustion, including: Measurement and simulation of scalar and vector properties; Novel techniques; State-of-the art applications. Fundamental investigations of combustion technologies and systems, including: Internal combustion engines; Gas turbines; Small- and large-scale stationary combustion and power generation; Catalytic combustion; Combustion synthesis; Combustion under extreme conditions; New concepts.