家用空调风冷冷凝器的数值分析

NUMERICAL ANALYSIS OF AIR COOLED CONDENSER

对单排管的家用空调风冷冷凝器进行了CFD的数值模拟,并搭建了冷凝器的实验系统对3D模型的CFD模拟进行验证.比较结果表明,两者存在一个小偏差(<9%),但是两者的趋势完全一致.CFD计算可以得到一些实验无法得到的内部流动信息,有助于我们更好地理解冷凝器的机理。本文在实验的范围以外进行了"数值实验",冷凝器的其它结构不变,翅片的间距存在一个最优值,同样管间距也存在一个最优值,为设计新的冷凝器提供了合理、可靠的方向.

CFD simulation of a 1-row condenser in a domestic air conditioner was made. A condenser experiment system was designed and built to validate the CFD result. Calculations were performed for different air frontal velocities and different condensation temperature. Even if an offset（less than 9%） of between CFD calculations and the experimental results, the trends are comparable and CFD study permits to reach local information, leading to better understanding of the physical phenomena. The prediction outside the experiment range was discussed by performing ＂numerical experiment＂. It is found that there is optimum fin space when other structure parameters of the tube-fin condenser are given, and there is optimum tube space when other structure parameters of the tube-fin condenser are given.