The volatility and evaporation rate of aviation fuels impact combustion efficiency at some operating conditions as well as the jet-engine combustor operability, including ignition, lean blowout, and combustion dynamics. To help characterize the volatility of jet fuel, one experimental approach utilizes a one-plate atmospheric distillation (ASTM D86), while the other employs a close to infinite plate system in a gas chromatogram (GC) and the corresponding elution time of n-alkanes to simulate a distillation curve (ASTM D2887). The simulated distillation has been more repeatable historically, but with the advent of sustainable aviation fuels, the interpretation of this GC data and its correlation to the traditional one-plate approach are not clear. Here, we measured the one-plate (D86) and simulated (ASTM D2887) distillations of neat SAF candidates, their blends, and several conventional fuels. A total of 66 and 4 samples were measured in the simulated distillation and one-plate experiments, respectively. A simulated distillation curve blend rule is reported here as well as the impact of blending high concentrations of single components in HEFA. Significant disagreements between the calculation of D86 correlated data from D2887 data and the directly measured D86 data are discussed.

中文翻译：

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可持续航空燃料的挥发性测量：D86 和 D2887 方法的比较研究

航空燃料的挥发性和蒸发率会影响某些操作条件下的燃烧效率以及喷气发动机燃烧室的可操作性，包括点火、稀薄井喷和燃烧动态。为了帮助表征喷气燃料的挥发性，一种实验方法利用单板常压蒸馏 (ASTM D86)，而另一种实验方法在气相色谱 (GC) 中采用接近无限的板系统以及相应的正构烷烃洗脱时间模拟蒸馏曲线 (ASTM D2887)。历史上模拟蒸馏的可重复性更高，但随着可持续航空燃料的出现，GC 数据的解释及其与传统单板方法的相关性尚不清楚。在这里，我们测量了纯 SAF 候选物、它们的混合物和几种传统燃料的单板 (D86) 和模拟 (ASTM D2887) 蒸馏。模拟蒸馏实验和一板实验分别测量了 66 个和 4 个样品。这里报告了模拟蒸馏曲线混合规则以及在 HEFA 中混合高浓度单一组分的影响。讨论了根据 D2887 数据计算 D86 相关数据与直接测量的 D86 数据之间的显着差异。