摘要
对烧结不锈钢颗粒多孔介质的单相流阻力特性进行试验研究,根据孔隙率的大小选择简单堆积颗粒方式作为模拟的单元模型,在此几何模型上设定对称边界,在孔隙尺度下通过求解标准N-S方程及k-ε紊流模型对其进行数值研究。分析了单相流流经烧结不锈钢颗粒多孔介质后的单位压降与等效雷诺数的关系,并基于实验数据拟合出了表征多孔材料流动压降与颗粒直径、流速、孔隙率的Tadrist关系式中的两个常系数。完整的Tadrist关系式可以作为烧结不锈钢颗粒多孔介质内流动阻力在宏观尺度上的预测模型。
The single-flow resistance in sintered stainless steel particles porous media was studied experimentally. Selecting the SC model as the geometrical model and it was studied numerically by solving N-S equation and k-ε turbulence model in pore scale at the same time. The relation between the pressure drop per unit in sintered stainless steel particles porous media and equivalent Reynolds number was analyzed. Two constant coefficients in Tadrist equation indicating the relation between the pressure drop per unit and particles diameter, porosity, flow velocity was obtained by the fitting based on the experimental data. The complete Tadrist equation could be taken as a prediction model to predict the flow resistance in sintered stainless steel particles porous media in the macro scale.
出处
《机械设计与制造》
北大核心
2014年第1期197-200,共4页
Machinery Design & Manufacture
基金
粤港关键领域重点突破项目(2009Z001)
中央高校基本科研业务项目(2012ZB0016)
关键词
烧结不锈钢
多孔介质
流动阻力
预测模型
Sintered Stainless steel
Porous media
Single-Flow Resistance
Prediction Model
