气固两相流动的湍流脉动扩散数学模型及其应用

本文提出了气固两相流动的湍流扩展数学模型，本模型用k-ε双方程模型求解气相湍流场，并根据气流脉动的频谱、能谱曲线提出了随机富工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。

NUMERICAL MODELING FOR TWO-PHASE TURBULENT FLOWS AND ITS APPLICATION

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.