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首页> 外文期刊>Combustion and Flame >Experimental and modeling study on the oxidation of Jet A and the n-dodecane/iso-octane-propylbenzene/l ,3,5-trimethylbenzene surrogate fuel
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Experimental and modeling study on the oxidation of Jet A and the n-dodecane/iso-octane-propylbenzene/l ,3,5-trimethylbenzene surrogate fuel

机译：Jet A和正十二烷/异辛烷/正丙基苯/ 1,3,5-三甲基苯替代燃料氧化的实验与模型研究

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摘要

Jet A POSF 4658 and n-dodecane/iso-octane-propylbenzene/l,3,5-trimethylbenzene (2nd generation surrogate) oxidation experiments were conducted in a shock tube at high pressures and at fuel lean and rich conditions to verify if the formulated surrogate fuel emulates the combustion characteristics of the jet fuel. A model was developed for the 2nd generation surrogate using an existing 1st generation surrogate model (consisting of n-decane/iso-octane/toluene) as the base model and sub-models for n-propylbenzene and 1,3,5-trimethylbenzene were included from the literature. The experimental work on both the Jet A and 2nd generation surrogate was performed in a heated high-pressure single pulse shock tube at equivalence ratios of 0.46, 1.86 and 0.47, 1.85, respectively. Experimental data were obtained over the temperature range of 879-1733 K, a pressure range of 16-27 atm, and reaction times from 1.34 to 3.36 ms. The mole fractions of the stable species were determined using gas chromatography and mass spectroscopy. Comparing the Jet A and the 2nd generation surrogate experiments showed that the surrogate fuel emulates the decay of O_2, and the formation of CO, CO_2, and C_1-C_3 intermediate species within experimental errors. The modeling results of the 2nd generation surrogate model compared against the experimental data showed good agreement with the mole fractions of CO, CO_2, C_1-C_3 intermediate species and the decay of the surrogate fuel and oxygen. Comparison of the modeling results for O_2 decay to the 2nd generation surrogate experiments and pure 1,3,5-trimethylbenzene oxidation experiments revealed that the surrogate fuel model is capable of predicting O_2 decay with a greater degree of accuracy in the 2nd generation surrogate experiments than in that of pure 1,3,5-trimethylbenzene experiments. This suggests that the radical pool formed due to the non-aromatics species during the consumption of 2nd generation surrogate fuel components prior to the formation of CO and CO_2 could contribute to the initial decay of O_2 at lower temperatures and thereby results in better prediction by the model, which includes both non-aromatics and aromatics chemistry, of O_2 decay and formation of CO and CO_2. Flow reactor simulations of the 2nd generation surrogate fuel experiments showed the surrogate model captures the overall trends of the decay of O_2 and the formation of CO, CO_2, and H_2O. Additionally, simulated shock tube ignition delay times above 750 K were within a factor of two when compared to experimental ignition delay times.
机译：Jet A POSF 4658和正十二烷/异辛烷/正丙基苯/ l，3,5-三甲基苯（第二代替代物）的氧化实验在高压，稀油和浓油条件下在激波管中进行，以验证是否配制的替代燃料可模拟喷气燃料的燃烧特性。使用现有的第一代替代模型（由正癸烷/异辛烷/甲苯组成）作为基础模型开发了第二代替代模型，正丙苯和1,3,5-三甲基苯的子模型分别为从文献中包括。在加热的高压单脉冲激波管中分别进行当量比为0.46、1.86和0.47、1.85的Jet A和第二代替代产品的实验工作。在879-1733 K的温度范围，16-27 atm的压力范围以及1.34至3.36 ms的反应时间范围内获得了实验数据。使用气相色谱法和质谱法测定稳定物质的摩尔分数。比较Jet A和第二代替代物实验表明，替代物燃料模拟了O_2的衰减以及在实验误差范围内CO，CO_2和C_1-C_3中间物种的形成。与实验数据相比，第二代替代模型的建模结果与CO，CO_2，C_1-C_3中间物种的摩尔分数以及替代燃料和氧气的衰减具有良好的一致性。将O_2衰减的建模结果与第二代替代实验和纯的1,3,5-三甲基苯氧化实验进行比较后发现，与第二代替代实验相比，替代燃料模型能够以更高的准确度预测O_2衰减。在纯1,3,5-三甲基苯实验中进行。这表明，在第二代替代燃料组分消耗之前，在形成CO和CO_2之前，由于非芳香族物质而形成的自由基库可能有助于O_2在较低温度下的初始衰变，从而导致对O_2的更好预测。 O_2衰变以及CO和CO_2形成的模型，包括非芳香族和芳香族化学。第二代替代燃料实验的流动反应器模拟显示，替代模型捕获了O_2衰减以及CO，CO_2和H_2O形成的总体趋势。此外，与实验点火延迟时间相比，超过750 K的模拟冲击管点火延迟时间在两倍之内。

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  • 来源
    《Combustion and Flame》 |2013年第1期|17-30|共14页
  • 作者

    Tomasz Malewicki; Soumya Gudiyella; Kenneth Brezinsky;

  • 作者单位

    Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, 842 W Taylor St., M/C 251. Chicago, 1L 60607, USA;

    Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, 842 W Taylor St., M/C 251. Chicago, 1L 60607, USA;

    Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, 842 W Taylor St., M/C 251. Chicago, 1L 60607, USA;

  • 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 eng
  • 中图分类
  • 关键词

    shock tube; surrogate fuel; oxidation; jet A; chemical kinetic model;

    机译：冲击管替代燃料氧化喷气机A;化学动力学模型;

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