摘要
针对中大型空气源热泵冷热水机组的风侧V型翅片管式换热器,采用CFD方法研究了其空气流场特性,采用实验测量值验证数值模拟结果,验证结果表明数值模拟的合理性和可靠性。系统分析了V型翅片管式换热器空气流场特性,详细研究了换热器夹角大小对空气流场分布的影响并阐明了各种流动现象的产生机理。研究结果表明:V型翅片管式换热器迎面风速沿换热器高度方向分布较不均匀,沿换热器长度方向分布相对均匀;换热器夹角大小是决定V型换热器迎面风速分布不均匀的主要因素,主要表现在迎面风速最大值随换热器夹角值的增大而向换热器下部移动,且当换热器夹角大小为90度时,迎面风速最大值位于换热器中部位置,且此时换热器迎面风速分布呈上下对称状态。
The airflow field of the heat exchanger at the air side of an air source heat pump heater/chiller was studied by using the CFD software.The numerical results were validated by the experiments.The influence of the intersect angle on the airflow field was discussed in details.The results show that the face velocity distribution along the heat exchanger height was more non-uniform and the airflow field was determined by the heat exchanger construction.The maximum air velocity moved downwards along the heat exchanger height with the increase in the intersect angle.When the intersect angle was 90 degree,the maximum air velocity occurred at the middle location of the heat exchanger and the up-and-down distribution of air velocity was symmetrical.
出处
《制冷学报》
CAS
CSCD
北大核心
2010年第2期22-25,共4页
Journal of Refrigeration
关键词
热工学
空气源热泵
V型翅片管换热器
风速分布
夹角
Pyrology
Air source heat pump
V-type fin tube heat exchanger
Air velocity distribution
Intersect angle
