Adiabatic laminar burning velocities and post-flame NO concentrations for flat, non-stretched, premixed C₂H₄/air flames were experimentally determined with a heat flux burner of improved design, over equivalence ratios ranging from 0.7 to 2, at atmospheric pressure and initial temperature of 298 K. Recognizing that C₂H₄ is a main intermediate in high-temperature oxidation pathways of heavy hydrocarbons, these data are essential for the development, validation and optimization of kinetic models for any fuel.

The present measurements were then compared with the data available in the literature obtained with different techniques under the same experimental conditions. Regarding burning velocity measurements, the comparison showed considerable scatter among existing stretch-corrected data, which corroborate the necessity for the present adiabatic, non-stretched results. Regarding NO concentrations, an excellent agreement was observed between the present in situ, non-intrusive laser-induced fluorescence measurements and the only dataset available in the literature, determined by the phenol disulfonic acid method.

A comparison of experimental and computational results using two contemporary comprehensive, detailed chemical kinetic mechanisms, along with one from the authors presented in this work, was also conducted and discussed. Discrepancies between experiments and model predictions and among models themselves were observed under rich conditions. Notwithstanding, the present updated model showed overall good performances in reproducing both laminar burning velocities and nitric oxide concentrations. Further numerical analyses were performed to identify the main causes of the observed differences. The results showed that the description of the relative importance of reactions involving vinyl and hydrogen cyanide consumption pathways, due to remaining uncertainties, lead to the different model behaviors.

使用改良设计的热通量燃烧器，以当量比在0.7至2的大气压下，通过改良设计的热通量燃烧器，通过实验确定了扁平，未拉伸，预混合C ₂ H ₄ /空气火焰的绝热层流燃烧速度和火焰后NO浓度。初始温度为298K。认识到C ₂ H ₄是重烃高温氧化途径的主要中间体，这些数据对于开发，验证和优化任何燃料的动力学模型至关重要。

然后将当前的测量结果与文献中可得的数据进行比较，这些数据是在相同的实验条件下使用不同技术获得的。关于燃烧速度测量，该比较显示了在现有的拉伸校正数据之间存在相当大的分散性，这证实了目前绝热，非拉伸结果的必要性。关于NO的浓度，目前的非侵入式激光诱导荧光原位测量结果与文献中仅有的通过酚二磺酸法测定的唯一数据集之间观察到了极好的一致性。

还对使用两种当代全面，详细的化学动力学机理以及本研究中提出的作者的一种动力学机理进行的实验和计算结果进行了比较和讨论。在丰富的条件下，观察到实验与模型预测之间以及模型本身之间的差异。尽管如此，当前更新的模型在再现层流燃烧速度和一氧化氮浓度方面显示出总体良好的性能。进行了进一步的数值分析，以确定观察到差异的主要原因。结果表明，由于存在不确定性，对涉及乙烯基和氰化氢消耗途径的反应的相对重要性的描述导致了不同的模型行为。