摘要
本文提出了气固两相流动的湍流扩散数学模型。本模型用k-ε双方程模型求解气相湍流场,并根据气流湍流脉动的频谱、能谱曲线提出了随机富氏级数来模拟气相脉动速度,用拉氏方法描述颗粒的运动,故称为脉动频谱随机颗粒轨道模型。本文还给出了本模型在气固多相射流和流化床内应用的实例。
A numerical model for turbulent fluctuation and diffusion of gas-particle flows is presented. This procedure treats the thrbulent gas flow field by using the k- equations, and models the turbulent fluctuation velocity of gas flow as a random Fourier series based on the fluctuation frequency and spectrum. The kinematic properties of particles are described by the Lagrange approach. Hence the model could be known as the Fluctuation-Spectrum-Random-Trajectory model. Some examples on the two-phase turbulent laden jets and particle movements in the fluidzed beds are illustrated as applications of the model.
出处
《应用力学学报》
CAS
CSCD
北大核心
1990年第1期50-55,131,共6页
Chinese Journal of Applied Mechanics
基金
国家青年自然科学基金
