The ignition delay times of toluene, n-heptane/iso-octane primary reference fuel blends, and toluene/n-heptane/iso-octane toluene primary reference fuel blends were studied in the miniature high repetition rate shock tube (HRRST). In the HRRST, the temperature and pressure change during the test time, complicating interpretation of ignition delay times. Two methods of chemical kinetic modeling were employed in order to account for the changing thermodynamic states. One was based on direct simulation using the pressure profile and the kinetic mechanism, and the other was based on a Livengood-Wu type approach using modeled constant state ignition delay times. Two different kinetic mechanisms were used in simulating the data. Both methods showed agreement with experimental data over a range of temperatures, pressures, and blends. While overall agreement was fair, agreement was poorer for one of the mechanisms for the primary reference fuel blends. An evaluation of the ignition delay iso-contours from these mechanisms for representative HRRST experiment thermodynamic trajectories revealed that the HRRST measured IDTs are controlled by the high temperature chemistry and are more sensitive to temperature. The different performance of mechanisms is therefore attributed to their different high temperature reactivity.

在微型高重复频率冲击管（HRRST）中研究了甲苯，正庚烷/异辛烷主要参考燃料混合物和甲苯/正庚烷/异辛烷甲苯主要参考燃料混合物的点火延迟时间。在HRRST中，温度和压力在测试时间内会发生变化，这使点火延迟时间的解释变得复杂。为了解决热力学状态的变化，采用了两种化学动力学建模方法。一种基于压力分布和动力学机制的直接模拟，另一种基于Livengood-Wu型方法，使用建模的恒定状态点火延迟时间。在模拟数据时使用了两种不同的动力学机制。两种方法均在一定温度，压力和混合温度范围内均与实验数据吻合。虽然总体协议是公平的，但对于主要参考燃料混合物的一种机制，协议却较差。通过这些机制对代表性HRRST实验热力学轨迹的点火延迟等值线进行评估，发现HRRST测量的IDT受高温化学物质控制，并且对温度更敏感。因此，机制的不同性能归因于它们不同的高温反应性。