主流区风口模型在CFD模拟中的应用

Jet Main Region Specification Model Applied to CFD Simulation

提出主流区风口模型计算气流温度和速度的特性公式,并研究其在工程中的实际应用情况.利用主流区风口模型、基本模型、盒子模型、N点动量模型分别模拟了送风口气流分布情况.结果表明,基本模型与盒子模型对于结构复杂的送风口模拟失效;基于N点动量模型和主流区模型的流体速度在工作区的模拟值与实测值的相对误差小于20%;在主流区模型中,送风口附近的气体速度模拟值与实测值的最大相对误差小于15%.

The characteristic equations for temperature and velocity of air flow in jet main region specification model were put forward and validated in a case study. Jet main region specification model, basic model, box model, and N-point momentum model were applied to simulating air flow distribution of air terminal device （ATD）with complicated geometry, respectively. The results demonstrate that basic model and box model fail to simulate ATD with complicated structure; at the occupant zone, the relative errors between simulated and measured velocities of air flow are less than 20% based on either N-point momentum model or jet main region specification model; around the ATD zone, the maximum relative error between the simulated and measured velocities of air flow is less than 15% based on jet main region specification model.