空调房间内的三维非均温气流组织的数值研究

【作者】 黄雪莲；

【导师】 戴有为；

【作者基本信息】 南京理工大学 ， 流体力学， 2003， 硕士

【摘要】 本论文应用计算流体力学的理论和方法模拟三维较复杂条件下空调房间室内空气流场的湍流流动。研究在强制对流的作用下，室内气流的流动结构、速度、温度分布以及换热规律。在对数学模型及物理模型进行理论分析的基础上，对含湍流双方程模型及非均温自然对流的耦合方程组采用了联立迭代解方法，并使用了对流-扩散方程系数的计算法、SIMPLEC算法、交错网格法、ADI线迭代法、块修正技术等，边界条件采用了的k-ε模型结合壁面函数的方法。并将数值模拟的结果采用计算机图形学的直观方式来表示多种气流组织方案的气流流型，分析讨论其气流分布规律、特点，及其适用场合。计算的结果证实了利用k-ε湍流模型对非均温的房间的气流组织进行数值计算是可行的。这一数值模拟方法也能帮助设计人员预测其气流设计方案的效果。这对于保证良好的房间空调系统气流组织设计方案、提高室内空气品质、减少建筑物的能耗，对建筑物热环境的节能设计及室内空气质量的评价都有重要的意义。更多还原

【Abstract】 This paper is an application of Computational Fluid Dynamics in the turbulent flow of three-dimensional air-conditioned room. The airflow structure, velocity, temperature and the law of heat exchange on the condition of the forced convection are studied. On the basis of the theoretical analysis of physical and mathematical model, the iterative method is adopted to the conjugated governing equations, and the numeration of the coefficient to the convection-diffusion equation, SIMPLEC algorism, staggered grid method, ADI line iteration method, and block correction technique are used, and so on. K-ε turbulence model linked with the wall function are applied to the boundary condition. The results of numerical simulation for many different kinds of airflow are expressed in streamline chart of airflow structure through the computer graphics, and the law and character of the airflow distribution and the application are discussed. The results validate that the K-ε turbulence model in the numerical computation to the airflow structure of thermal non-uniform room is feasible. At the same time, it is elicited that the numerical simulation also helps man to predict the effect of the airflow designing. Its application is of great importance to the increase of the level of the designing project of airflow organization in the air-conditioned room, the increase of the air quality in the room, the decrease of the energy expensed in the building, the energy saving design to the heat environment of the building and the evaluation of the air quality in it.更多还原