摘要
为了研究旋风分离器内部气体和固体的运动状况与其分离机理,采用FLUENT软件对一旋风分离器内部气相流场和颗粒的运动状况进行三维数值仿真模拟.在仿真过程中,采用RNGk-ε方程来模拟其中的气相湍流流动,采用Lagrange方程模拟颗粒的运动.仿真结果表明,分离器内部的流动空间可分为内、外两个流动区域,在不同的流动区域中,气体压力、速度场的分布有较大的差异;固体颗粒的运动较为复杂,且带有一定的随机性;固体颗粒的分离效率与其进入分离器的具体位置有关.
In order to study the condition of motion of the gas and liquid inside the gas cyclone and the mechanism of separation, three-dimensional numeric the motion condition of particles in it was conducted used to simulate turbulent flow of the gaseous phase simulation of internal flow field of gaseous phase and by using the software FLUENT. RNG k-ε mode was and the Lagrange equation was used to simulated the particles＇motion. The results showed that the flow field in gas cyclone could be divided into two parts： the inner one and outer one, and there was great difference between the two parts with respect to the distribution of pressure and velocity of gas; the particles＇motion was complicated and random and their separation efficiency was dependent on the entering position at the intake.
出处
《兰州理工大学学报》
CAS
北大核心
2007年第2期50-53,共4页
Journal of Lanzhou University of Technology
关键词
旋风分离器
数值模拟
流场分布
分离效率
gas cyclone
numerical simulation
flow field distribution
separation efficiency
