【作者】 周佳； 张宝怀；

【Author】 ZHOU Jia,ZHANG Bao-huai Southeast University,Nanjing 210096,China

【机构】 东南大学；

【摘要】 以侧面送回风的气流场作为数值计算的基本模型,应用计算流体力学的理论和方法模拟建筑物室内通风空调气流的的湍流流动。以地板散发的污染物甲醛为例,对室内的流场和甲醛的浓度分布进行数值模拟。在对数学模型及物理模型进行理论分析的基础上,考虑浮升力的室内气流组织,运用κ-ε模型与SIMPLE方法对室内气流组织进行了三维数值模拟,边界条件采用了κ-ε模型结合壁面函数的方法进行了处理。同时对方程离散、方程组的耦联求解及蜘SIMPLE算法等数值计算以及湍流及其模型等问题进行了论述。最后,对数值计算结果进行了分析和比较,从对室内空气品质的影响方面提出了改善房间气流组织的建议,从而为空调房间气流的研究和优化设计提供了一种重要方法。更多还原

【Abstract】 The paper is an application of Computational Fluid Dynamics in the turbulent flow of air - conditioned room in which the numerical model is based on the fluid field of side-in and side-out airflow in air-conditioned room. Taking the contamination formaldehyde emanated from floor as the example, we make a numerical simulation of the distribution of formaldehyde and the flow of air-conditioned room. Based on the theoretically analysis of physical and mathematical model, the two-equation turbulence model and method of SIMPLE are adopted simulate the three-dimensional air distribution of the room, effect of buoyant force on model is considered and the wall function is used for the boundary condidon. Governing equation discrete, solving of the conjugated algebraic equation set and SIMPLE method are also discussed in this paper. At last, the reliability and rationality of this simulation are analyzed and compared with different illustration. Form the analysis and comparing, the advice for improving airflow in the room from the aspect of air quality is provided, and a new method for studying and designing the airflow in air-conditioned room is presented.更多还原