摘要
采用k-ε模型和壁面函数法耦合辐射模型对低温地板辐射采暖房间进行了数值模拟,通过分析室内温度分布特征及流动特性,得出了室内空气温度分布随室内高度的变化关系、围护结构表面温度及热流的分布特性,数值结果表明了在室内主流区域空气温度分布均匀,其温差在1℃左右,从而说明了低温地板辐射采暖舒适性的原因,数值模拟结果也表明了辐射在地板采暖中的重要性,辐射热流达到了总热流的50%-60%。
This paper investigates turbulent air convection coupled with thermal radiation in the radiant floor heating room by numerical simulation. The k-ε two-equation turbulent model is used in the numerical simulation of in-room air flow field and temperature distribution. According to the analysis of temperature distribution of air in the room's vertical direction and the wall surfaces temperature and heat flux distribution characteristics, the result show that except the boundary layer part along the wall, air temperature of the room are more or less uniform with 1°C difference, and this is the reason why radiant floor heating can cause to a good comfort. The numerical simulation results show also that the radiant heat transfer is very important in the floor heating room. It is 50-60 percent of total thermal flux.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2005年第3期501-503,共3页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.50476046
50425620)
关键词
低温地板辐射采暖
湍流
数值模拟
the radiant floor heating room
turbulence
numerical simulation
