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本文通过利用激波管实验装置,测量了丙酸甲酯(MP)在温度1020~1720 K、压力0.12~1.0 MPa、燃料浓度0.5%~2.0%以及当量比0.5~2.0范围内的着火延迟,并将实验结果与两个化学反应动力学机理(Princeton机理和Westbrook机理)的模拟结果进行了对比。由于两个机理都不能够很好地预测MP的着火延迟,通过对现有机理的优化,得到了一个改进的模型,该模型能够很好地预测本实验中MP的着火。
In this paper, the ignition delay of methyl propionate (MP) in the range of 1020 ~ 1720 K, pressure of 0.12 ~ 1.0 MPa, fuel concentration of 0.5% ~ 2.0% and equivalence ratio of 0.5 ~ 2.0 was measured by using a shock tube experimental apparatus. The experimental results are compared with the simulation results of two chemical reaction kinetics (Princeton mechanism and Westbrook mechanism). Since neither of the two mechanisms can predict the ignition delay of MP well, an improved model is obtained through the optimization of the existing mechanism, which can predict the ignition of MP in this experiment well.