混合通风对地板再悬浮颗粒物沉积和去除特性的影响

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中图分类号：X513；TU834 文献标志码：A

Abstract： 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 nonisothermal 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.

Keywords： hybrid ventilation; floor heating; computational fluid dynamics; environmental test chamber; Archimedes number

据统计，人们每天 90% 以上的时间在室内环境中度过[1]，因此室内空气质量的优劣与人体健康息息相关。（剩余13743字）