基于CFD分析的散热器结构优化

摘要

The flow and heat transfer performance analysis of a radiator under design has been proceeded by the software STAR - CCM +. The results indicate that the air side convection heat transfer coefficient at the front part of the radiator is far above the latter part. And it suggests the utilization ratio of the front part is higher than the latter part. After the thickness of the radiator is reduced, three simulations at air speed at 5m/s, 10m/s and 15m/s were conducted, the single core heat duty of the thinner one is about 75% of the thicker one when the air speed is at 15m/s. And as the speed of air become lower, the ratio becomes higher. So in the same cooling demand, the new radiator can reduce material cost greatly.%利用STAR—CCM＋软件对某款设计中的散热器进行了流动与传热性能的分析，分析结果显示，按空气来流方向为散热器芯体前端，空气侧的对流换热系数远远高于其后端。这表明散热器芯体前端的利用率较高。将散热器芯体变薄之后，分别计算空气来流速度为5m／s、10m／s和15m／s三工况下其单芯体散热量。在来流速度为15m／s的工况下修改后散热器的散热量为原散热器的75％左右，并且随着来流速度的降低，该数值逐渐的增大。这样在相同的散热需求时，新的结构可以较大的节约材料。