电沉积金属泡沫内的渗透流动特性

陈康 1; 2; 陈鹏飞 2; 李文升 1; 3; 谢向东 1; 郭烈锦 1; 赵亮 1; 彭怀午 2

doi:10.7652/xjtuxb202005012

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电沉积金属泡沫内的渗透流动特性

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- 电沉积金属泡沫内的渗透流动特性
- Permeation Characteristics of Electrodeposited Metal Foam
- 西安交通大学学报 2020年54卷第5期页码：87-94
- 作者机构：
  
  1. 西安交通大学动力工程多相流国家重点实验室,西安,710049
  2. 中国电建集团西北勘测设计研究院有限公司太阳能利用工程技术研究所,西安,710065
- 作者简介：
- 基金信息：
  
  : 2019-11-11。作者简介: 陈康(1988—),男,博士后;郭烈锦(通信作者),男,教授,博士生导师,中国科学院院士。基金项目: 国家自然科学基金资助项目(51888103)
- DOI：10.7652/xjtuxb202005012
  中图分类号： O359
- 网络首发：2020-05-10，
  
  纸质出版：2020
- 稿件说明：
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陈康 1, 2, 陈鹏飞 2, 等. 电沉积金属泡沫内的渗透流动特性[J]. 西安交通大学学报, 2020,54(5):87-94.

Permeation Characteristics of Electrodeposited Metal Foam[J]. 2020, 54(5): 87-94.
陈康 1, 2, 陈鹏飞 2, 等. 电沉积金属泡沫内的渗透流动特性[J]. 西安交通大学学报, 2020,54(5):87-94. DOI： 10.7652/xjtuxb202005012.

Permeation Characteristics of Electrodeposited Metal Foam[J]. 2020, 54(5): 87-94. DOI： 10.7652/xjtuxb202005012.

摘要

为了探究电沉积法制备金属泡沫微观孔胞结构对渗透特性的内在作用机理

针对不同结构与材料的金属泡沫完成了空气渗透流动实验。采用基于正五边形宽骨架结构的正十二面体的金属泡沫孔胞模型

建立了金属泡沫半经验渗透模型; 分析了金属泡沫内流动阻力的变化规律

获得了包括孔隙率和孔密度等不同微观结构参数下金属泡沫内流体渗透特性。研究结果表明:小流速范围内

金属泡沫内流体流动为Darcy流态

受黏性作用影响; 大流速范围内

金属泡沫内流体流动为Forhheimer流态

受惯性作用影响。电沉积金属泡沫内阻力因子的常数项为0.099 5

较粉末烧结金属泡沫内阻力因子的常数项明显增大。提出了基于孔隙率与孔密度的金属泡沫水力直径修正计算模型

与正五边形宽骨架模型预测结果相比误差在±5%以内; 获得了单位长度压差的Darcy-Forhheimer型预测公式

预测值与实验值的最大误差在±15%以内

并提出了以孔隙率和水力直径为变量的金属泡沫渗透率K和惯性系数F的预测公式。

Abstract

To explore the affecting mechanism of permeation characteristics of electrodeposited metal foam

experimental study was conducted for different foam structures and foam materials. Based on the fat pentagon-frame dodecahedron pore model

a semi-empirical permeation model of metal foam was developed. The variation of flow resistance in metal foam was analy-ed

and the permeation characteristics of fluid in metal foam with different pore densities and porosities were obtained. The results show that the flow pattern of penetration is Darcy flow at small velocity

which is dominated by viscous effect

and the flow pattern is Forhheimer flow at large velocity

which is dominated by inertial effect. The constant term in the friction factor correlation of electrodeposited metal foam was 0.099 5

much larger than that of the constant of powder sintered metal foam. The modified model of hydraulic diameter was proposed with a maximum -5% deviation. A new Darcy-Forhheimer correlation of different

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