| 非均匀孔隙率防风抑尘网优化设计 |
| |
| 引用本文： | 王世杰,宋翀芳,雷勇刚,景胜蓝,秦成君,刘治廷. 非均匀孔隙率防风抑尘网优化设计[J]. 华侨大学学报(自然科学版), 2018, 0(6): 865-871. DOI: 10.11830/ISSN.1000-5013.201804070 |
| |
| 作者姓名： | 王世杰 宋翀芳 雷勇刚 景胜蓝 秦成君 刘治廷 |
| |
| 作者单位： | 太原理工大学 环境科学与工程学院, 山西 太原 030024 |
| |
| 摘 要： | 基于均匀孔隙率抑尘网后呈现贴附涡旋贴附的流动状态,提出将抑尘网从下到上划分为孔隙率不同的三部分,建立非均匀孔隙率下,露天堆场周围空气流场的数学模型.运用Fluent 6.3,模拟9种非均匀孔隙率组合下网后的空气流动和堆面受力.结果表明:三层非均匀抑尘网的设置可人为引导网后空气运动的微环境;网的上、下部孔隙率(εH,εL)不变,中部孔隙率(εM)从0.3增至0.6时, 料堆的迎风面流场先减弱后增强, εM=0.4时,获最佳减速效果;上部孔隙率从0增至0.2时,εH=0.1时最优;调整网下部孔隙率,εL=0.2时最佳;孔隙率组合εH∶εM∶εL=0.1∶0.4∶0.2以最大限度地虚弱迎风面受力而获最小剪切力,与均匀空隙率(ε=0.3)网相比减小66.1%,与上、下两层非均匀网(εH∶εL=0.1∶0.3)相比减小31.2%,抑尘效果最佳.
|
| 关 键 词： | 露天堆场 非均匀孔隙率 防风抑尘网 数值模拟 |
Design Optimization of Non-Uniform Porosity Porous Fences |
| |
| WANG Shijie,SONG Chongfang,LEI Yonggang,JING Shenglan,QIN Chengjun,LIU Zhiting. Design Optimization of Non-Uniform Porosity Porous Fences[J]. Journal of Huaqiao University(Natural Science), 2018, 0(6): 865-871. DOI: 10.11830/ISSN.1000-5013.201804070 |
| |
| Authors: | WANG Shijie SONG Chongfang LEI Yonggang JING Shenglan QIN Chengjun LIU Zhiting |
| |
| Affiliation: | College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China |
| |
| Abstract: | Based on the flow state of adherence-vortex-attachment after the uniform porosity, this work divides the porous fence into three parts with different porosities from the bottom to the top and a physical and mathematical model of the air flow field around the open storage yard under non-uniform porosity is established. Fluent 6.3 is used to simulate the air flow behind the porous fence and the force applied to the pile face under nine combinations of non-uniform fence with different porosity. The results show that the three-layer non-uniform fence can artificially guide the microenvironment of air movement behind the fence. The upper porosity and the lower porosity(εH, εL)are unchanged, and the central porosity(εM)increases from 0.3 to 0.6. The flow field at the windward side of the pile reduces first and then increases, and the best deceleration effect is obtained at εM=0.4. When the upper porosity increases from 0 to 0.2, εH=0.1 is optimal. By adjust the porosity of the lower part of the fence, εL=0.2 is the best. Compared with the uniform porosity(ε=0.3)and the two-layer non-uniform network(εH∶εL=0.1∶0.3), the force is reduced by 66.1% and 31.2% respectively when using the porosity combination of εH∶εM∶εL=0.1∶0.4∶0.2, which can maximize the weak windward face to obtain the minimum shear force and therefore shows the best fence effect. |
| |
| Keywords: | open storage pile non-uniform porosity porous fence numerical simulation |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《华侨大学学报(自然科学版)》浏览原始摘要信息 |
|
点击此处可从《华侨大学学报(自然科学版)》下载全文 |
|
