摘要
对水在空气中湍动雾化射流的气液两相流场进行了数值模拟。其中,气体流场采用k-ε湍流模型进行模拟,给出了载气轴向速度的分布情况．对喷雾粒子的运动采用颗粒轨道法,建立粒子破碎和碰撞的数值模型,研究了液雾粒径在不同工况下沿轴向的变化趋势。数值模拟结果与实验结果在多种气液比下进行了比较,两者吻合较好．同时,分析了初始粒径和粒子总数及喷嘴尺寸对液雾粒径变化趋势的影响,讨论了有助于粒径均匀分布的条件．
Simulation of turbulence atomization jet in the air-water two phase flow field was performed. The gas flow field was simulated using κ -εturbulence model, presenting the velocity distribution of the carrier gas. Using Lagrangian particle method, the droplet motions were described, with the particle collision and breakup model to examine the diameter evolution along the axial direction under different conditions. The simulation results compare well with experimental data, under various airto-liquid ratio （ALR）. Meanwhile, results also show the effect of initial drop size, total particle number and the nozzle size on the changing tendency of droplet size, the terms that is useful to the uniformity of particle size distribution are concluded.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2007年第2期251-254,共4页
Journal of Engineering Thermophysics
基金
国家科技部重大基础研究前期研究专项资助项目(No.2005CCA06900)
