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首页> 外文期刊>Combustion Science and Technology >Flame propagation in the mixtures of O_2/N_2 oxidizer with fluorinated propene refrigerants (CH_2CFCF_3/ CHFCHCF_3, CH_2CHCF_3)
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Flame propagation in the mixtures of O_2/N_2 oxidizer with fluorinated propene refrigerants (CH_2CFCF_3/ CHFCHCF_3, CH_2CHCF_3)

机译：氟化丙烯制冷剂O_2 / N_2氧化剂混合物中的火焰繁殖（CH_2CFCF_3 / CHFCHCF_3，CH_2CHCF_3）

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摘要

A kinetic model is presented for high-temperature oxidation and combustion of the refrigerants: 2,3,3,3-tetrafluoropropene (R-1234yf), 1,3,3,3-tetrafluoropropene (R-1234ze(E)), and 3,3,3-trifluoropropene (R-1243zf) at atmospheric pressure. The kinetic model is based on: GRI-Mech-3.0 and previously developed models for the inhibition of hydrocarbon flames by 2-bromo-3,3,3-trifluoropropene (2-BTP) and C-1-C-2 hydrofluorocarbons. The model includes 1001 reactions and 105 species. Thermodynamic equilibrium calculations indicate a maximum combustion temperature of 2047 K, 2037 K, and 2312 K for R-1234yf, R-1234ze(E), and R-1243zf, respectively, in air for standard conditions. Calculations of the 1D, steady, adiabatic, laminar burning velocity for these refrigerants with air or oxygen-enriched air indicate reasonable agreement with experimental data from the literature when the burning velocity is above 10 cm/s. The simulations are used to understand the relevant reactions. Despite the relatively high F/H ratio in the reactants (2), the combustion is dominated by reactions with radical pool radicals typical of hydrocarbons (O, OH, and H). The combustion of R-1234yf or R-1234ze(E) is characterized by a two-zone flame, the second of which is a slow reaction zone accounting for CO and CF2O consumption and additional temperature rise of a few hundred K. Simulations of the effects of water vapor on the burning velocity of R-1234yf and R-1234ze(E) capture qualitatively the trends in the experimental results. For certain values of the equivalence ratio and oxygen content of air, the premixed flame structure shows temperature peak in the main reaction zone higher than the equilibrium value.
机译：提出了一种动力学模型，用于制冷剂的高温氧化和燃烧：2,3,3,3-四氟丙烯（R-1234YF），1,3,3,3-四氟丙烯（R-1234ze（E）），和在大气压下3,3,3-三氟丙烯（R-1243ZF）。动力学模型基于：GRI-MECH-3.0和先前开发的模型，用于抑制2-溴-3,3,3-三氟丙烯（2-BTP）和C-1-C-2氢氟烃的烃火焰。该模型包括1001个反应和105种。热力学平衡计算表示R-1234YF的最大燃烧温度为2047 k，2037k和2312k，分别在空气中分别在空气中用于标准条件的R-1234YF。这些制冷剂的1D，稳定，绝热，层状燃烧速度的计算，其中空气或氧气的空气表示，当燃烧速度高于10cm / s时，与文献的实验数据表示合理的协议。模拟用于了解相关反应。尽管反应物（2）中的F / H比相对较高，但燃烧由典型的烃（O，OH和H）的基团池自由基来支配。 R-1234YF或R-1234ZE（E）的燃烧的特征在于双区火焰，其中第二个是慢反应区核算CO和CF2O消耗，额外的温度升高为几百K.模拟水蒸气对R-1234YF的燃烧速度和R-1234ze（E）的影响定性占据实验结果的趋势。对于空气的等效率和氧含量的某些​​值，预混合的火焰结构显示在高于平衡值的主反应区中的温度峰。

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