孔板送风房间内污染物分布的模拟与实验

Numerical simulation and experimental investigation of contamination distribution in a chamber with perforated ceiling air supply

摘要:

为研究孔板送风条件下室内污染物体积分数的分布规律,采用实验测试和数值模拟两种方法.建模时采用基本模型和N点风口模型两种方法进行孔板入口边界条件的处理,模拟结果表明:两种处理方法计算的污染物体积分数分布规律相近;将实验数据和模拟结果进行对比,其变化趋势吻合良好,其中N点风口模型的模拟结果更接近实验情况,从而验证了应用该模型研究室内污染物分布特性的可行性.

Abstract:

To study the contamination distribution in a chamber with perforated ceiling air supply,simulative analysis and experimental tests are carried out in this paper.In modeling,the Basic model and N-spot air model are both used for defining the orifice entrance boundary condition.The simulation results show that the distribution of contamination concentration agrees well with the test result.Especially,the simulation result of the N-spot air model is closer to the experimental one,which proves the feasibility of this model in analyzing indoor contamination distribution.