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航空煤油火焰传播特性对航空动力装置的研发与设计均具有重要意义。本文在液体燃料对冲火焰实验台上,使用相位多普勒粒子分析仪(PDPA)在较宽的当量比范围内,测量了三种煤油表征燃料与空气掺混气的层流火焰传播速度。在标准大气压下,初温378 K时正癸烷、甲基环己烷和初温388 K时甲苯与空气预混气燃烧时能够达到的最大火焰传播速度为64.2 cm/s、58.3 cm/s和52.4 cm/s。在实验数据的基础上,进一步采用Chemkin软件对预混火焰进行了动力学分析,探讨了造成三种燃料火焰传播性质差异的动力学原因。
The flame propagation characteristics of aviation kerosene are of great significance to the research and development and design of aerodynamic devices. In this paper, we measured the laminar flame propagation velocity of three kinds of kerosene to characterize the fuel and air admixture gas over a wide range of equivalence ratio using a Phase Doppler Particle Analyzer (PDPA) on a liquid fuel heal flame test bench. At normal atmospheric pressure, the maximum flame propagation velocity of 64.2 cm / s and 58.3 cm / s can be achieved at the premixed temperature of 378 K with n-decane, methylcyclohexane and premixed toluene at 388 K, respectively And 52.4 cm / s. Based on the experimental data, kinetic analysis of the premixed flame was further performed using Chemkin software to investigate the kinetic causes of the differences in the propagation properties of the three fuel flames.