• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Building and Environment >Particle transport characteristics in the micro-environment near the roadway
【24h】

Particle transport characteristics in the micro-environment near the roadway

机译：巷道附近微环境中的颗粒输运特性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The particles emitted from vehicles will pose a significant threat to the indoor air quality for the buildings next to the road, so it is of benefit to the indoor air quality to reveal the particle transport characteristics in the micro-environment near the roadway. In this work, the particle transport and airflow pattern near a typical highway at various barriers and meteorological conditions are numerically investigated by means of the drift-flux model combined with Eulerian fluid method. The results show that the wind speed plays a significant role in the dispersion of the vehicle emitted particles. The higher the wind speed is, the lower the indoor particle concentration exhibits. The noise barriers can effectively block the incoming flow and restrict the transporting downstream of vehicle emitted particles under most of the meteorological conditions. On the contrary, the vegetation canopies along the roadsides cannot confine the dispersion of the particles. The trees in front of the building facade tend to slow down the air velocity and result in the particle gathering near the windows, which will lead to higher indoor particle concentrations. The indoor particle concentration varies widely with the positions and leaf area density distributions of the trees in the wind direction of 90 degrees, yet, varies little in the wind direction of 45 degrees. The indoor air quality can be improved by increasing the particle deposition velocity on trees and keeping windows closed. (C) 2016 Elsevier Ltd. All rights reserved.
机译：车辆排放的颗粒会对道路旁建筑物的室内空气质量构成重大威胁，因此，揭示道路附近微环境中的颗粒传输特性对室内空气质量是有益的。在这项工作中，通过漂移通量模型结合欧拉流体方法，对典型公路在各种障碍和气象条件下的颗粒传输和气流模式进行了数值研究。结果表明，风速在车辆排放颗粒的扩散中起着重要作用。风速越高，室内颗粒物浓度越低。在大多数气象条件下，隔音屏障可以有效地阻挡进入的气流，并限制车辆排放颗粒的下游传输。相反，沿路边的植被冠层不能限制颗粒的分散。建筑立面前的树木往往会减慢空气速度，并导致窗户附近聚集颗粒，这将导致室内颗粒浓度更高。室内颗粒物浓度随树木在90度风向的位置和叶面积密度分布而变化很大，而在45度风向则变化很小。通过提高树木上的颗粒沉积速度并保持窗户关闭，可以改善室内空气质量。 （C）2016 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Building and Environment》 |2016年第6期|138-158|共21页
  • 作者

    Jin Xinming; Yang Lijun; Du Xiaoze; Yang Yongping;

  • 作者单位

    North China Elect Power Univ, Sch Energy Power & Mech Engn, Minist Educ, Key Lab Condit Monitoring & Control Power Plant E, Beijing 102206, Peoples R China;

    North China Elect Power Univ, Sch Energy Power & Mech Engn, Minist Educ, Key Lab Condit Monitoring & Control Power Plant E, Beijing 102206, Peoples R China;

    North China Elect Power Univ, Sch Energy Power & Mech Engn, Minist Educ, Key Lab Condit Monitoring & Control Power Plant E, Beijing 102206, Peoples R China;

    North China Elect Power Univ, Sch Energy Power & Mech Engn, Minist Educ, Key Lab Condit Monitoring & Control Power Plant E, Beijing 102206, Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Particle transport; Particle concentration; Airflow pattern; Micro-environment; Indoor air quality; Deposition;

    机译：颗粒传输;颗粒物浓度;气流模式;微环境;室内空气质量;沉积;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号