摘要
气流动态化是改善建筑热环境和人体热舒适性的重要方向。从气流动态特征对人体热舒适的影响和气流动态特征的物理结构两个方面总结了气流动态特征的研究进展,并重点介绍了清华大学在此方面的研究成果。综述表明,气流动态特征对热舒适性的影响的研究目前主要集中在湍流度、脉动频率两个参数上。近年来,清华大学等国内研究者运用湍流统计理论、随机分析方法、近代混沌理论、分形理论对自然风和机械风的动态特征进行分析,发现自然风和机械风的气流动态特征有着明显的区别和联系,并提出了双对数功率谱曲线负斜率β值等判别自然风和机械风的动态参数。
The dynamization of airflow is an important direction to improve the indoor thermal environment and the human thermal comfort. The research on the influence of airflow fluctuations on thermal comfort mainly focuses on the effects of turbulence intensity and fluctuation frequency. The fluctuant characteristies of natural wind and mechanical wind have obvious differences but are related. With the development of turbulence statistical theory, chaos and fractal theory, researchers began to use these theories to describe the structural characteristics of the fluctuating airflow in different environment or by different generation source, and proposed the dynamic parameter of discriminating natural wind and mechanical wind by the negative slope value of β of two logarithm power curve. The current achievements reviewed on research of airflow fluctuation and thermal environment include two parts： the influence of the airflow fluctuations on thermal comfort and the physical structure of airflow fluctuations. These achievements are reviewed first, followed by a more detailed summary of research conducted at Tsinghna University.
出处
《建筑节能》
CAS
2007年第2期6-10,共5页
BUILDING ENERGY EFFICIENCY
关键词
气流动态特性
自然风
机械风
功率谱
热舒适
dynamic characteristics of airflow
natural wind
mechanical wind
power spectrum
thermal comfort
