摘要
为了提高平面电机水冷散热器热流性能,该文构建了散热器热流模型并开展了"结构尺寸-流道拓扑"并行优化设计。首先,构建了散热器3层热流模型,该模型囊括了盖板与流固混合层的流动/传热耦合效应以及散热器厚度方案对热流场的影响。其次,基于3层热流模型,引入孔隙度域来描述流道拓扑,构建了包含流道拓扑变量与层厚变量的连续伴随结构优化模型,并提出了相应的散热器层厚与流道拓扑并行优化方案。最终,数值案例部分评估了3层热流模型准确性及计算效率、"层厚-流道拓扑"并行优化设计结果热流性能和"尺寸-拓扑"并行优化方案。结果表明:相较于全3D热流模型,所构建的3层热流模型仅需少于10%的计算时间获得了近乎一致的温度场;相较于基准设计,所优化的散热器结构新颖且展现出高达30.82%的目标性能改善;相较于离散优化方案,所提出的并行优化方案高效且取得了具有竞争力的设计。
The thermal-hydraulics of water-cooled heat sinks for planar motors were analyzed using a thermofluid model of a heat sink to concurrently optimize the heat sink size and topology. The three-layer thermofluid model of the heat sink included the coupled flow and heat transfer effects between the cover plates and the fluid-solid mixing channel including the influence of the flow channel thickness on the thermal-hydraulics. The model used a porosity model to describe the channel topology and a continuous-adjoint structural optimization model for the geometric variables related to the channel topology and thickness in a concurrent size-topology optimization scheme. Various numerical examples show the accuracy and efficiency of the three-layer thermofluid model and the size-topology optimization scheme. The three-layer model uses 10% less calculational time than full 3 D models while still accurately predicting the temperature distribution. The optimized heat sinks have unique topologies with up to 30.82% better heat transfer than baseline designs. This concurrent approach is efficient and obtains designs that are competitive with discrete optimization approach results.
作者
赵家琦
张鸣
朱煜
成荣
李鑫
王磊杰
胡楚雄
ZHAO Jiaqi;ZHANG Ming;ZHU Yu;CHENG Rong;LI Xin;WANG Leijie;HU Chuxiong(Beijing Key Laboratory of Precision/Ultra-precision Manufacturing Equipments and Control,State Key Laboratory of Tribology,Department of Mechanical Engineering,Tsinghua University,Beijing 100084,China)
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2022年第3期400-407,共8页
Journal of Tsinghua University(Science and Technology)
基金
国家自然科学基金(51677104,51922059)
北京市自然科学基金(JQ19010)。
关键词
散热器
热流建模
多层模型
拓扑优化
尺寸优化
并行优化
heat sink
thermofluid modeling
multi-layer model
topology optimization
size optimization
concurrent optimization
