An experimental multiparameter investigation on the thermochemical structures of benchmark ethylene and propane counterflow diffusion flames and implications to their numerical modeling

Peng Jiang; Mengxiang Zhou; Daxin WenYu Wang

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An experimental multiparameter investigation on the thermochemical structures of benchmark ethylene and propane counterflow diffusion flames and implications to their numerical modeling

机译：An experimental multiparameter investigation on the thermochemical structures of benchmark ethylene and propane counterflow diffusion flames and implications to their numerical modeling

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Counterflow diffusion flame is a canonical non-premixed flame configuration that is suitable for studyingcomplex combustion chemistries such as soot formation. An important objective of such studies isto build predictive kinetic models. For validation of these models, complete and accurate experimentalcharacterization of the flames are essential. Existing counterflow flame- based soot studies focusedprimarily on the determination of soot volume fraction, while simultaneous measurements of temperature,species concentrations and in particular flow fields were less common. Here we performed anexperimental multiparameter investigation for a comprehensive characterization of the most importantphysical and chemical properties of four benchmark ethylene and propane counterflow flames, with theintention to provide data with sufficient details for the setup of corresponding numerical simulations andthe evaluation of the resulted numerical data. Particle image velocimetry, tunable diode laser absorptionspectrometry, microprobe sampling with gas chromatography, laser light extinction, laser induced incandescenceare the techniques used respectively to measure flow fields, temperature, gas-phase species,and soot. Special attention was given to the effects of radial profiles of nozzle exit velocity on the quasione-dimensional counterflow simulation, whose results were compared against both the experiments andtwo-dimensional simulation. Probe effects on speciation were also quantitatively evaluated by comparingCO_2 mole fraction as measured with the intrusive probe sampling as well as an independent opticaltechnique. Our specially chosen ethylene and propane flames offered a direct experimental evidence thata flame producing higher concentration of benzene can have a significantly lower sooting tendency. Itis hoped that the present comprehensive dataset can serve as a useful validation target for future highfidelitygas-phase and soot models. It is also our intention that we provide sufficient details regarding theexperimental apparatus and associated measurement techniques so that interested readers can reproduceour experimental data.

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《Combustion and Flame》 |2021年第12期|111622.1-111622.19|共19页
作者
Peng Jiang; Mengxiang Zhou; Daxin WenYu Wang;
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作者单位

Laboratory for Advanced Combustion, School of Automotive Engineering, Wuhan University of Technology, Wuhan 430070, PR China;

Laboratory for Advanced Combustion, School of Automotive Engineering, Wuhan University of Technology, Wuhan 430070, PR China,Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan 430070, PR China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种英语
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Benchmark flames; Chemical speciation; TDLAS; PIV; Kinetic modeling;

An experimental multiparameter investigation on the thermochemical structures of benchmark ethylene and propane counterflow diffusion flames and implications to their numerical modeling

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