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建立了泡沫陶瓷的三维物理模型和气粒两相流模型。该模型着重考虑了泡沫陶瓷对柴油机排气微粒的扩散拦截和惯性碰撞拦截 ,对三维模型中的气粒两相流进行了模拟计算。通过模拟计算 ,分析了气体流速、微粒粒径、泡沫陶瓷微孔参数对微粒扩散拦截和惯性碰撞拦截效率的影响。研究结果有助于理解泡沫陶瓷的过滤机理 ,为泡沫陶瓷的参数设计和基于泡沫陶瓷的微粒过滤器设计提供了理论依据
The three-dimensional physical model of foamed ceramic and gas-particle two-phase flow model are established. In this model, diffusion-intercepting and inertial collision interception of foam ceramic to exhaust particulates of diesel engine are mainly considered, and the gas-particle two-phase flow in the three-dimensional model is simulated. The effects of gas flow rate, particle size and foamed ceramic micropore parameters on particle diffusion and inertial collision and interception efficiency were analyzed by simulation. The results are helpful to understand the filtration mechanism of foam ceramic and provide the theoretical basis for the parameter design of foam ceramic and the design of particle filter based on foam ceramic