气体－多组分颗粒相间作用机理与组分颗粒动力学模型的研究

项目名称： 气体－多组分颗粒相间作用机理与组分颗粒动力学模型的研究

项目编号： No.51206020

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 工程热物理与能源利用学科

项目作者： 王淑彦

作者单位： 东北石油大学

项目金额： 25万元

中文摘要： 本项目将以提升管反应器内高浓度气固两相流动为研究对象，基于分子动力学，建立多组分颗粒碰撞动力学，研究不同颗粒组分之间动量和能量的传递规律。采用Chapman-Enskog迭代法，建立组分颗粒颗粒动理学，揭示不同颗粒组份相间动量及脉动能量之间的传递和耗散规律。结合气相大涡模拟，建立高颗粒浓度气固两相欧拉-欧拉双流体模型，研究流化床反应器稠密气固两相流动与混合协同规律，研究组分颗粒与组分颗粒、组分内颗粒与颗粒、颗粒与气体之间的相互作用。以灰颗粒-石灰石颗粒构建双组份颗粒循环流化床试验平台。采用CCD高速摄像仪测量双组份颗粒流动特性，研究流化床反应器内颗粒脉动速度各向异性分布对流化床结构的影响。模拟与实验研究流化床内气固两相相间作用机制和协同规律，为正确预测流化床反应器内气固两相宏观流动过程奠定理论基础。

中文关键词： 颗粒动理学；气固两相流；相间作用；多组分；数值模拟

英文摘要： The anisotropic kinetic theory of multitype particles is established to describe the transfer and exchange of fluctuation kinetic energy and momentum between the particle phases based on molecular dynamics in dense gas-solid two-phase flow,incorporating with Chapman-Enskog iterative approach. The two-fluid Euler-Euler model for dense gas-solid two-phase flow is proposed which coupled with large eddy simulation for gas turbulence. The momentum and energy transfer and dissipation are studied due to the collision of mulitype particles on the basis of the collision dynamics of particles. The dense gas-solid two-phase flow and mixing synergy mechanism are performed in fluidized beds. The interactions between different particle phases, particle and particle in the phase, and particle and gas are investigated. The system of multitype particles in circulating fluidized bed is consisted by ash particles and calcium oxide particles. The characteristic of two group particles flow in a fluidized bed is recorded by a CCD high-speed video camera. The influence of anisotropic distribution of particle fluctuating velocity on the structure of fluidized bed is investigated. This study is not only for establishing the interaction and synergy mechanism between gas-solid two phases, but also for developing a foundation for predictin

英文关键词： kinetic theory of granular flow；gas-solid two-phase flow；interface interaction；multitype particles；numerical simulation