用CFD方法改进室内非等温送风气流组织设计

用合理的湍流模型和风口模型模拟非等温送风室内空气流动情况,并用一个非等温送风的实例进行了验证．然后利用该湍流和风口模型对一个工程实例非等温送风的室内空气速度场、温度场进行数值模拟,同时也给出利用传统射流理论的分析结果与之比较,借此分析当前室内非等温送风设计中通常存在的“冷风下坠”和“热风上浮”问题,指出传统射流设计方法的不足,从而提出一种利用CFD方法改进非等温送风气流组织设计的方法,并将其应用于中所提工程实例以说明该思路是可行的．

Improving Non-isothermal Airflow Pattern Designing with CFD Method

The proper turbulence model and supply opening model for non isothermal indoor air flow simulation are adopted to simulate indoor air distribution. The validation example shows that the models can get engineering satisfied results for indoor airflow simulation. Then the air flow and temperature distribution in an actual conference room are numerically solved by CFD method with these models, while the conventional jet theory method is used to compare the results. From this, the "cold air draught" and " hot air climbing" problems are analyzed. The shortcoming of conventional jet theory method is pointed out by the results. Consequently, a new idea for non isothermal ventilation airflow pattern designing with its application is proposed.