中文摘要：

针对缺乏正庚烷宽压力范围层流火焰传播速度实验测量的问题，利用最新发展的高温高压燃烧弹开展了初始温度为373,K、初始压力为0.1～2.0,MPa、当量比为0.6～1.7的正庚烷球形火焰传播研究．实验结果显示出非常明显的压力依赖效应．利用文献正庚烷动力学模型对正庚烷火焰传播进行了数值模拟，结果表明，文献模型的预测结果在0.1～0.5,MPa 下偏高．通过敏感性分析发现，C0～C2小分子反应是正庚烷火焰传播中高敏感性的反应，且受初始压力变化的影响显著．通过对文献模型中重要压力依赖型反应的修正，提升了模型对正庚烷变压力层流火焰传播速度的预测能力．

英文摘要：

Recognizing the lack of laminar burning velocity measurement of n-heptane over a wide pressure range, this work investigates the spherical flame propagation of n-heptane at the initial temperature of 373,K,initial pres-sures of 0.1—2.0,MPa and equivalence ratios of 0.6—1.7 using a newly designed high temperature and high pressure combustion vessel.The experimental results show remarkable pressure dependence.Two kinetic models of n-heptane in literature are used in the numerical simulation,and it is shown that the expeirmental results are overpredicted at 0.1—0.5 MPa.The sensitivity analysis indicates that the laminar burning velocities of n-heptane are more sensitive to C0—C2 reactions than those to the reactions of larger species.These sensitive reactions are more easily influenced by the variation of initial pressure.The rate constants of several pressure dependent reactions in Blanquart model are up-dated and the performance of the model in predicting the laminar burning velocities of n-heptane at various pressures is improved.