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| 混合通风对地板再悬浮颗粒物沉积和去除特性的影响 |
| Influence of hybrid ventilation on resuspended particle deposition and removal characteristics from floor surfaces |
| 投稿时间：2023-11-17 |
| DOI：10.13259/j.cnki.eri.2025.02.001 |
| 中文关键词: 混合通风 地板供热 计算流体力学 环境实验舱 阿基米德数 |
| 英文关键词:hybrid ventilation floor heating computational fluid dynamics environmental test chamber Archimedes number |
| 基金项目:国家自然科学基金资助项目（42277477、52106102） |
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| 中文摘要: |
| 通过实验和数值模拟研究再悬浮颗粒物在混合通风和地板供热条件下的沉积和去除特性。实验在缩尺比为1∶3的环境实验舱中进行。采用阿基米德数Ar来表征由地板辐射产生的热浮升力与来流惯性力相互作用的强弱。考虑了6种Ar（0、2.01、4.02、6.03、8.04、10.04）和2种回风口位置（同侧和异侧）实验条件。结果表明：在等温工况和非等温工况下进行实验时，速度和无量纲温度的数值模拟结果与实验结果均吻合良好；随着Ar的增加，室内送风气流会向下弯折，从而改变室内流场并形成旋涡；综合考虑行人呼吸高度处颗粒物质量浓度和室内颗粒物去除率，选择实验条件为同侧通风、Ar为2.01最为适宜。 |
| 英文摘要: |
| The deposition and removal characteristics of resuspended particles in a hybrid ventilation and floor-heating environment was investigated with experiments and numerical simulations. The experiments were conducted in an environmental test chamber with 1∶3 scale ratio, and the Archimedes number Ar was used to characterize the interaction between thermal buoyancy generated by floor heating and the inertial force of the incoming airflow. Six Ar values (0, 2.01, 4.02, 6.03, 8.04, 10.04) and two return air configurations (co-side and opposite-side) were considered. The results show that the numerical simulation results of velocity and dimensionless temperature are in good agreement with the experimental data for both isothermal and non-isothermal environmental chamber tests. With the increase of Ar, the indoor supply airflow gracefully curves downward, resulting in a transformation of the indoor flow field and the generation of vortices. By comprehensively evaluating particle concentration at human breathing height and overall particle removal efficiency, the optimal configuration is determined to be co-side ventilation when Ar is 2.01. |
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