Numerical Simulation of Liquid-Fueled Detonations by an Eulerian-Lagrangian Model
In this paper, an Eulerian-Lagrangian two-phase flow model for liquid-fueled detonations is constructed The gaseous mixture is described by Eulerian method, and all the liquid particles in gaseous mixture are traced by Lagrangian method. In the present numerical simulations, an improved space-time conservation element and solution element (CE/SE) scheme is adopted. Detonations in liquid C10H22-O2/air systems are simulated. Different fuel droplet sizes and equivalence ratios are considered in present study. Interestingly, the numerical results show that liquid-fueled detonations are substantially different from gaseous detonations. With larger droplet sizes, a deficit in the propagation velocity compared to the gas-phase velocity is observed in mixtures with lean fuel,while an increase in the propagation velocity compared to the gas-phase velocity is observed in the mixtures with very rich fuel which is consistent with the experimental study by Tang and Nicholls. We give a reasonable explanation about the surprising phenomenon by detailed numerical results. In addition, the formation and propagation of liquid detonation wave are characterized by series of results and the influence of particle radii is also discussed.
两相流模型 拉格朗日方法 液体爆炸燃料 数值模拟
Hua Shen Gang Wang Kaixin Liu Deliang Zhang
LTCS and Department of Mechanics & Aerospace Engineering, College of Engineering, Peking University, Institute of Mechanics, Chinese Academy of Science, Beijing, China Department of Mechanics & Aerospace Engineering, College of Engineering, Peking University, Beijing,
国内会议
太原
英文
1-18
2011-07-01（万方平台首次上网日期，不代表论文的发表时间）