A numerical simulation of a single cylinder research diesel engine fuelled by natural gas and diesel oil in dual fuel mode was conducted to test the reaction mechanism presented by Li and Williams in Ref. [1] for methane ignition. The mechanism made of only 9 reactions can represent a good compromise between reduction of computational time and accuracy of results. Simulations reproduce test cases previously carried out experimentally and numerically with a simpler kinetic mechanism at three different premixed ratios (10%, 15% and 22%). Finally, a last case characterized by a supply of methane consistent with the typical load levels for this kind of engines (80%), was investigated only numerically. All the simulations were performed with the KIVA-3V solver on a geometry which includes open valve periods, intake and exhaust ducts. Through a comparison between experimental and numerical results, a calibration of the model has been performed and a quite good fitting of the models has been achieved.

进行了以天然气和柴油为燃料，以双燃料模式为燃料的单缸研究型柴油机的数值模拟，以测试Li和Williams在参考文献中提出的反应机理。[1]用于甲烷点火。仅由9个反应组成的机制可以代表减少计算时间和结果准确性之间的良好折衷。模拟重现了之前用三种简单的预混合比例（10％，15％和22％）以更简单的动力学机制通过实验和数字进行的测试案例。最后，仅通过数值研究了以甲烷供应量与这种发动机的典型负荷水平一致（80％）为特征的最后一种情况。所有仿真都是使用KIVA-3V求解器在几何形状上执行的，该几何形状包括打开的气门周期，进气道和排气道。