微岐管式微通道热沉

 

        两相岐管式微通道(MMC)热沉它具有低热阻、结构紧凑、所需冷却液量小、流率低、沿流动方向温度分布均匀等优点,从结构上讲,两相MMC热沉内,流体流经换热面的路径为"∏"型通道,即流体首先经入口以垂直于换热面的方向流入与换热面平行的微通道;然后流经微通道受热发生相变,最后在出口以垂直于换热面的方向流出。从换热机理上讲,两相MMC热沉中包含受迫对流沸腾与射流冲击换热,两种传热方式均具有很高的传热率。

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  翅片倾角对温度场的影响

Fin angle effect on the temperature fields 

三维翅片层流强化换热效果 

 

 

 

 

 

 

 

 

 

 

 

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浸没圆形射流d=1000μm                              自由表面圆形射流d=1000μm
Submerged circular jets: d=1000mm                        Free-surface circular jets: d=1000mm
驻点:普朗特数对努谢尔特数的影响
Prandtl number dependence of Nusselt number at stagnation point

   

 

                                                           雷诺数的影响:FC72                                    变压器油浸没射流的数值与实验结果比较

                                            Influence of Reynolds number: FC72                                                     Comparison of Experimental data with numerical result  
                                                                                                                                                                         for submerged transformer oil

  

 
 

                                      形射流:理论与实验结果比较                    Comparison of theoretical results with experimental data for circular jets