重型机械Issue(6)：33-42,10.
基于不同多孔介质模型的袋式除尘器流体动力学数值对比
Numerical comparison of fluid dynamics in bag filters using different porous media models
吴京栋 1杨雪莲 2王云朋 2张家伟 2邹阳 2李梦珂 2朱孟琪2
作者信息
- 1. 陕西冶金设计研究院有限公司,陕西 西安 710018||中国重型机械研究院有限公司,陕西 西安 710018
- 2. 陕西冶金设计研究院有限公司,陕西 西安 710018
- 折叠
摘要
Abstract
Accurate characterization of the filter material as a porous medium is critical for computational fluid dynamics(CFD)simulations of bag filters.This study systematically evaluates two prevalent models—the porous jump model and the porous continuous model—to assess their applicability.The results show that both models predict a similar four-stage development of the internal transient flow(injection-entrainment,impact development,turbulent diffusion,and steady-state establishment)and agree on the overall trend of axial velocity along the filter bag.However,the porous continuous model demonstrates superior performance.By explicitly representing the porous layer thickness and incorporating the coupled effects of viscous and inertial resistance,it more accurately captures the flow rectification by the porous layer,the evolution of large-scale vortex structures,and the permeation of ambient fluid into the porous medium.Moreover,simulations using the porous continuous model reveal a pronounced longitudinal pressure gradient inside the filter bag,a feature not adequately captured by the jump model.Consequently,the porous continuous model provides a more realistic representation of the fluid-porous media interactions under practical conditions,yielding higher simulation accuracy and greater value for engineering applications.关键词
袋式除尘器/多孔介质模型/计算流体动力学/气流组织/数值模拟Key words
bag filter/porous media model/computational fluid dynamics(CFD)/airflow distribution/nu-merical simulation分类
机械制造引用本文复制引用
吴京栋,杨雪莲,王云朋,张家伟,邹阳,李梦珂,朱孟琪..基于不同多孔介质模型的袋式除尘器流体动力学数值对比[J].重型机械,2025,(6):33-42,10.
