摘要
采用计算流体动力学(CFD)方法,研究了上送下回的气流组织方案下某影剧院观众厅的室内热环境.选用了零方程湍流模型进行数值模拟,首先验证零方程模型应用于高大空间气流组织模拟的准确性,再对比分别采用零方程模型与标准k-ε方程模型进行数值计算的收敛时间,得出零方程模型工程效率更高的结论,然后采用零方程模型,分别对原气流组织方案和改进方案进行数值模拟,计算得出两种方案的温度场和速度场云图并进行对比.分析得出,气流组织方案改进后,送风口使用散流器,回风口布置在观众厅后部,室内温度场和速度场得到明显改善.同时,研究也表明,用CFD技术分析影剧院观众厅的气流分布并提出优化方案是一种节约时间、人力和物力的高效手段.
This study uses computational fluid dynamics （CFD） method to evaluate the indoor thermal envi- ronment of an air-conditioned theater auditorium under airflow patterns in the form of up-inlets and down-out- lets. Zero-equation turbulence model is employed to simulate airflow. First, the study verifies the accuracy of the zero-equation model that was applied to the simulation of large space airflow. Subsequently, the zero-equa- tion model is compared with the standard k-ε equation model from convergence time after the simulation is car- ried out. Comparison result shows that the zero-equation model works more efficiently compared with the stand- ard k-ε equation model. CFD method employing zero-equation model is adopted to simulate original and opti- mized airflow patterns in the form of up-inlets and down-outlets, by which the cloud atlas of temperature and velocity field are calculated. A comparative analysis is then conducted. Results show that indoor temperature and velocity field are improved significantly after optimization using diffusers and arranging exhaust openings in the rear of the auditorium. Furthermore, this study indicates that using the CFD technology to analyze airflow in a theater auditorium and the proposed optimization scheme is an efficient method to save time, manpower, and materials.
出处
《东北电力大学学报》
2018年第1期27-34,共8页
Journal of Northeast Electric Power University
关键词
CFD
零方程
气流组织
影剧院
CFD
Zero-equation model
Air distribution
Theater
