fluent热源对复合式空调房间内气流组织的影响
本文根据地板辐射供暖与置换通风各自的原理，采用CFD方法，运用fluent软件建立长6。5米，宽4。5米，高3。5米普通家庭客厅的物理模型，研究地板辐射供暖作为内热源对置换通风房间气流组织的影响及室内热污染源对复合式空调房间的影响。通过对该房间内气流组织的数值模拟，得出不同热源强度及位置分布情况下的速度图和温度图。87327
通过对比分析，得出内热源的存在会改变室内气流组织的分布，对室内温度及室内新风速度都会产生一定的影响。与无内热源的室内气流组织相比，热源强度增加，会增加室内气流组织的温度，更符合人体对室内热舒适性的要求；热源位置的改变会影响室内污染物及旧空气的排出的速度，对室内洁净起到一定的调节作用。
毕业论文关键词：复合式空调系统；fluent；内热源；气流组织；数值模拟
Abstract“Heat grow from the head,cold join from the foot”。Traditional way of getting warm is difficult to meet the needs of the people for the feet to keep warm。Floor radiant heating is very good to improve the defects of traditional heating for the feet to keep warm,so as to get the attention of people。Complex of floor radiant heating combined with displacement ventilation air conditioning system give full play to their advantages,to have the advantage of spotless,energy saving and comfort。
This paper,based on the principle of floor radiant heating and displacement ventilation,using CFD method,utilizing fluent software build 6。5 meters long,4。5 meter wide, 3。5 meters high average family physical model and numerical model of the sitting room,mainly analyzes the influence of internal heat source for the room air distribution。
Through comparison and analysis, it is concluded that the existence of the internal heat source will change the distribution of indoor air distribution, the indoor temperature and indoor air velocity has a certain influence。Compared with no inner heat source indoor airflow, increasing heat source intensity will increase the indoor air temperature, more in line with the requirements of the human body of indoor thermal comfort;Changing the position of heat source can affect indoor pollutants and discharge of the old air speed,playing a regulatory role in cleaning indoor air。
Keywords:Hybrid air conditioning system;fluent;internal heat source;air distribution;numerical modeling。
目 录
第一章 绪论 1
1。1课题研究背景与意义 1
1。2国内外发展的现状 1
1。3主要工作内容 2
1。4本章小结 3
第二章 研究内容及方法 4
2。1复合式空调系统的介绍 4
2。2热源对复合式空调系统的影响 5
2。3室内气流分布特性评价指标 5
2。4 CFD简介 5
2。4。1 CFD的特点 6
2。4。2 CFD技术的应用 6
2。4。3 Fluent简介 7
2。5本章小结 7
第三章 模型建立及后处理 9
3。1物理模型的建立 9
3。1。1房间的几何模型及其简化 9
3。1。2热源的处理 9
3。1。3网格的划分 10
3。1。4模型的假设 10
3。2数学模型 10
3。2。1湍流数值模拟的相关理论 10
3。2。2 Boussinesq密度假定 10