Evaluation of detonation characteristics of aluminum/JP-10/air mixtures at stoichiometric concentrations

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• 作者：Lijuan Liu ; Qi Zhang ; ^{qzhang@bit.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Shilei Shen ; Dong Li ; Zheng Lian ; Yaxing Wang
• 关键词：Detonation characteristics ; Aluminum particles ; Gaseous JP-10 ; Numerical simulations
• 刊名：Fuel
• 出版年：2016
• 出版时间：1 April 2016
• 年：2016
• 卷：169
• 期：Complete
• 页码：41-49
• 全文大小：2454 K

文摘

In order to investigate the heterogeneous detonation characteristics of aluminum particles/JP-10/air mixtures, the gas–solid two phase flow and detonation models were established using the discrete phase model (DPM) and turbulent combustion model, and detonation properties of the aluminum particles/JP-10/air mixtures were simulated. At stoichiometric concentrations of the solid particle–gas mixtures, and four different mass ratios (100% aluminum particles/air, 60% aluminum particles/40% gaseous JP-10/air, 40% aluminum particles/60% gaseous JP-10/air, 100% gaseous JP-10/air), results reveal that obvious reaction relaxation phenomenon exists in aluminum particles detonation process, however, addition of gaseous JP-10 to aluminum particles obviously contributes to higher steady detonation propagation velocity and extended reaction zone width. Furthermore, 60% aluminum particles/40% JP-10/air mixture achieves the highest detonation velocity up to 2128 m/s, detonation pressure of 3.7 MPa, efficiently enhanced reaction zone width of 0.369 m, and the reaction times of JP-10/air and aluminum particles/air of 2.07 μs and 5.65 μs, respectively.