竖直壁面贴附式送风模式气流组织特性及其影响因素分析

Analysis on Air Distribution Characteristics of Vertical Wall Attached Air Supply Pattern and its Influence Factors

在对通风空调系统现有气流组织形式对比分析的基础上,提出了一种基于竖直壁面贴附式送风的新型气流组织形式。采用实验验证后的SST k-ω模型,对不同送风温度和速度下房间温度场和速度场分布进行了数值模拟研究,同时分析了排风口位置、房间尺度、送风口位置对该气流组织形式的影响。研究表明,送风速度是该模式气流组织特性的主要影响因素。房间气流组织效果与房间尺度和送风口位置有较大关系,受排风口位置影响较小。通过合理的参数设置,能够实现竖直壁面贴附式送风模式在现有建筑通风空调系统中的工程应用。

Based on comparative analysis of the existing air distribution modes in ventilation and air-conditioning system, a novel ventilation mode based on vertical wall attached air supply was presented. The velocity and temperature fields under different air supply velocities and temperatures were studied by numerical simulation that adopts the SST k-to turbulence model. In addition, effects of air outlet location, room scale and air diffuser location on airflow patterns were also studied respectively. The current results showed that the air supply velocity played an important role on air distribution characteristics; moreover, room scale and air diffuser location had greater influences on this ventilation mode, while the air outlet location slightly affected this mode. In general, under reasonable parameter settings, the air distribution of vertical wall attached air supply pattern could be used for room ventilation and air-conditioning engineering.