Experimental and numerical study of laminar burning velocity for Diisobutylene+ PRF/TRF mixtures

IF 5.6 2区 工程技术 Q2 ENERGY & FUELS
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Abstract

DIB (Diisobutylene, JC8H16) strongly correlates with real gasoline and significantly impacts the combustion behavior of alternative fuels designed as gasoline substitutes. However, accuracy concerns persist in laminar burning velocity data reported in literature. In this paper, the laminar burning velocities of DIB + air, DIB + PRF + air, and DIB + TRF + air mixtures were measured by the heat flux method at 1 atm. (PRF, Primary Reference Fuel; TRF, Toluene Reference Fuel) The equivalence ratio was controlled within 0.6–1.3, and the initial temperatures were set at 298K, 318K, and 338K. Additionally, by employing the mechanism proposed by Ren et al., the simulated values align with the experimental data, thus prompting the conduction of a reaction kinetic analysis. The analysis of chemical reaction kinetics reveals the reaction pathways of DIB, with a notable observation that an increase in temperature or a decrease in equivalence ratio can both lead to an elevation in the degree of unsaturation in the bonds of intermediate species. During laminar flame combustion, PRF and TRF compete with DIB for oxygen, with PRF appearing to have a stronger ability to capture oxygen. In addition, the laminar burning velocity temperature dependence coefficient α decreases first and then increases with the increase of the equivalence ratio, where the minimum α is obtained at equivalence ratio = 1.1. Additionally, the laminar burning velocity at higher initial temperatures is estimated by the extrapolation method and compared with the experimental data reported in literature.

二异丁烯+ PRF/TRF 混合物层流燃烧速度的实验和数值研究
DIB(二异丁烯,JC8H16)与真正的汽油密切相关,并对设计为汽油替代品的替代燃料的燃烧行为产生重大影响。然而,文献中报道的层燃速度数据的准确性仍然存在问题。本文采用热通量法测量了 DIB + 空气、DIB + PRF + 空气和 DIB + TRF + 空气混合物在 1 atm 条件下的层燃速度。(等效比控制在 0.6-1.3 范围内,初始温度分别设定为 298K、318K 和 338K。此外,通过采用 Ren 等人提出的机理,模拟值与实验数据一致,从而促使进行反应动力学分析。化学反应动力学分析揭示了 DIB 的反应途径,发现温度升高或等效比降低都会导致中间产物键的不饱和程度升高。在层焰燃烧过程中,PRF 和 TRF 与 DIB 竞争氧气,其中 PRF 捕获氧气的能力似乎更强。此外,层燃速度温度相关系数α随着当量比的增加先减小后增大,当量比 = 1.1 时α最小。此外,还通过外推法估算了较高初始温度下的层流燃烧速度,并与文献报道的实验数据进行了比较。
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来源期刊
Journal of The Energy Institute
Journal of The Energy Institute 工程技术-能源与燃料
CiteScore
10.60
自引率
5.30%
发文量
166
审稿时长
16 days
期刊介绍: The Journal of the Energy Institute provides peer reviewed coverage of original high quality research on energy, engineering and technology.The coverage is broad and the main areas of interest include: Combustion engineering and associated technologies; process heating; power generation; engines and propulsion; emissions and environmental pollution control; clean coal technologies; carbon abatement technologies Emissions and environmental pollution control; safety and hazards; Clean coal technologies; carbon abatement technologies, including carbon capture and storage, CCS; Petroleum engineering and fuel quality, including storage and transport Alternative energy sources; biomass utilisation and biomass conversion technologies; energy from waste, incineration and recycling Energy conversion, energy recovery and energy efficiency; space heating, fuel cells, heat pumps and cooling systems Energy storage The journal''s coverage reflects changes in energy technology that result from the transition to more efficient energy production and end use together with reduced carbon emission.
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