摘要
应用 FLUENT软件对一个 BCD- 2 35 W型家用间冷式冰箱风扇区域流场进行数值模拟 .紊流模型采用二价 k- ε模型 ,风扇叶片所在旋转区域采用多坐标系模型 ,蒸发器区域采用多空介质模型进行简化 ,目的是通过该部位流场的可视化 ,研究涡流形成的原因 ,并寻求消除该部位涡流以提高冰箱性能的方法 .为保证数值计算的精确性 ,风扇叶片通过激光扫描仪直接扫描进电脑 .研究发现 ,对风扇盖板作适当的改进 ,可以提高冰箱冷冻室内气流分布的均匀性 ,风扇向远离盖板方向移动一个适当的距离会基本消除盖板与风扇之间的涡流现象 ,而风扇朝远离冷藏室风道的方向移动 ,对改善风扇与盖板之间的流场 。
The flow field of fan zone in an indirect cool refrigerator was simulated with FLUENT code in order to visualize the airflow distribution, study the reason of vortex accruing, and find the methods of how to improve the performance of the refrigerator. The standard k ε model was used as a turbulence model, while the domain of fan blades was simplified as a multiple reference frame model, and the evaporator was simplified as porous media. To warrant the accuracy of calculation, the fan blades were scanned into computer with a laser scanner. The simulation result shows that modifying the fan cover can improve the uniformity of the freezer compartment, while moving the fan a proper distance away from the fan cover can get rid of the vortex, but moving the fan away from the freezer refrigerator duct does no good to improving the airflow distribution and increasing the efficiency of the evaporator.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2003年第7期1133-1136,共4页
Journal of Shanghai Jiaotong University
关键词
间冷式冰箱
流场
数值模拟
indirect cool refrigerator
flow fields
numerical simulation
