Numerical simulations of two-dimensional inviscid detonations for a stoichiometric propane/oxygen gas mixture are performed using a detailed chemical reaction model. The UC San Diego model which includes 57 chemical species and 268 elementary reactions is mainly used in the present study. It is shown that a grid size of 3 µm can capture important features such as the unburned gas pocket behind the detonation when compared to larger grid sizes. The effects of channel width show that the detonation propagates with the CJ (Chapman–Jouguet) velocity for all cases and for more than 100 times the channel width of 4.5 mm. Increasing the channel width results in an irregular detonation cell structure. A transverse detonation forms with cross-hatching marks on the maximum pressure history. The irregular detonation cell structure forms because both the reduced activation energy and the stability parameter have a value of approximately 10; however, the maximum thermicity in the detonation is one. The free radicals C₃H₇ and H₂O₂ play an important role in the propane oxidation under the high temperature in the detonation. The maximum concentration exists at a temperature of 2000–3000 K. The fifth-order WCNS (weighted compact nonlinear scheme) scheme can resolve the contact surface and complicated flow structure behind the detonation front compared to the second-order MUSCL (Monotonic Upstream-centered Scheme for Conservation Laws).

使用详细的化学反应模型对化学计量的丙烷/氧气混合物进行二维无粘爆轰的数值模拟。本研究主要使用包括57个化学物种和268个基本反应的UC圣地亚哥模型。结果表明，与较大的栅格尺寸相比，栅格尺寸为3 µm可以捕获重要特征，例如爆炸后未燃烧的气穴。通道宽度的影响表明，在所有情况下，爆炸均以CJ（查普曼–乔格特）速度传播，并且是4.5毫米通道宽度的100倍以上。增大通道宽度会导致不规则的爆轰孔结构。横向爆炸在最大压力历史记录上带有交叉影线。形成不规则的爆轰孔结构是因为降低的活化能和稳定性参数的值都约为10；但是，爆炸的最大热度是1。自由基C₃ H ₇和H ₂ O ₂在爆炸中高温下的丙烷氧化中起重要作用。最大浓度存在于2000–3000 K的温度下。与二阶MUSCL（单调上游为中心）相比，五阶WCNS（加权紧凑型非线性方案）方案可以解决爆炸前锋后的接触表面和复杂的流动结构。保护法计划）。