摘要
对两相圆孔射流颗粒喷入方法的关键问题进行了直接数值模拟研究。气相采用可压缩的N-S方程直接求解,颗粒相采用拉格朗日方法(Lagrangian)跟踪实际颗粒的运动。主要探讨了空间发展的两相圆孔射流在采用直接数值模拟算法的前提下,颗粒喷入的方法以及喷入方法对两相圆孔射流中不同直径颗粒的扩散特点。在拉格朗日坐标系下实际跟踪了每一个颗粒运动的轨迹,通过反复的数值试验研究发现,颗粒喷入方法是可信的,得到数值模拟结果成功地再现了不同直径颗粒扩散特性。
The injection methods of particles for the particle laden round jet were investigated by the DNS method.The compressible Navier Stokes equations were solved for the fluid phase.The Euler-Lagrangian method was used for the particle phase.The injection methods of particles for the particle laden round jet were studied using direct numerical simulation.The diffusion characteristics of different diameter particles were discussed.Under Lagrange coordinate system the trajectory of particles was tracked.It was found that the injection methods of particles were credible.And the diffusion charcteristics of different diameter particles were gotten by the numerical simulation.
出处
《能源工程》
2012年第2期17-23,共7页
Energy Engineering
关键词
气固两相
直接数值模拟
颗粒喷入方法
双向耦合
particle laden
direct numerical simulation
injection method of particles
two-way coupling
