稳态与非稳态下旋风分离器气相流场数值模拟方法研究

摘要

To study the characteristics of gas-phase flow field in a gas-solid cyclone separator, numerical simulation and calculation were performed on the flow field in the steady and unsteady state using Reynolds stress model, by adopting multi-block hybrid grid for the separator and different schemes for discretization of advection terms, after which the simulated results were compared with experimental data. Results show that for simulation of gas-phase flow field in a cyclone separator in the unsteady state, the best choice is to choose the second order upwind （SOU） scheme for momentum equations, the Quick scheme for kinetic en- ergy and its dissipation rate, and the first order upwind （FOU） scheme for Reynolds stresses.%为了研究旋风分离器气相流场的特性，在稳态与非稳态下，采用雷诺应力方程模型（RSM）对一台气一固旋风分离器气相流场进行了数值模拟和计算，其中旋风分离器网格划分采用混合网格分块划分技术，对流项分别采用不同阶格式进行离散，将数值模拟结果与试验数据进行了比较．结果表明：在非稳态下，动量（Momentum）方程采用二阶迎风格式（SOU），湍动能走、耗散率￡采用高阶的Quick离散格式，雷诺应力项（Reynolds stresses）采用一阶迎风格式（FOU）是模拟旋风分离器气相流场的最佳选择．