Numerical simulation of the combustion of nano-aluminum in carbon dioxide

作者：Sun, Yunlan; Wang, Qichang; Wu, Yuxin^*; Zhu, Baozhong^*; Pan, Jianfeng

来源：Acta Astronautica, 2017, 139: 428-434.

DOI：10.1016/j.actaastro.2017.07.032

• Nano-aluminum
• CO2
• Ignition
• Flame speed
• Numerical simulation

The ignition and combustion characteristics of nano -aluminum in CO2 were studied numerically using CHEMKINPRO and a detailed reaction mechanism. The effects of initial temperature on the combustion performance of nano -aluminum in either gas phase or liquid phase were analyzed. Numerical results show that increasing the initial temperature promotes the ignition of nano -aluminum. When nano -aluminum is in gas phase, the two -stage ignition regime disappears gradually with the increase of initial temperature because the initial system energy increases. In contrast, if nano -aluminum is assumed in liquid phase, the two -stage regime of ignition shows a reverse tendency. In addition, the calculated laminar flame speed reaches SI, = 32 m/s at an initial temperature To = 2100 K. The key reaction pathways of nano -aluminum in CO2 are Al + CO2 = A10 + CO, A1(2)O(3) = A1(2)O(2)+O, and Al2O2 = A1(2)O + 0. Al2O2 is a key intermediate species in nano -aluminum -CO2 system since most of 0 atoms are produced from its decomposition.

• 出版日期2017-10
• 单位江苏大学; 安徽工业大学