摘要
分别采用截锥体、圆弧形和三角形模型来模拟实际物体的接触面 ,利用DELAUNAY三角形非结构化网格离散温度场 ,并使用有限元法数值计算接触热阻。通过比较几种模型的计算结果 ,提出控制角为 30°的三角形模型有较高的精度。给出接触热阻的近似计算公式 ,并分析了表面粗糙度对接触热阻的影响 。
Using truncated cone, circular and triangular models to simulate the contact surface, the thermal contact resistance is calculated based on unstructured Delaunay triangulation gird solution and finite element method. The triangular model is considered more precise when its control angle is 30° and an approximate formula is provided for calculation of the thermal contact resistance by comparing computation models. The relationship with thermal contact resistance and surface roughness is discussed finally. The obtained results are considerate for engineering application.
出处
《上海航天》
2002年第4期33-36,共4页
Aerospace Shanghai
关键词
数值计算
接触热阻
有限元法
表面粗糙度
Thermal contact resistance
Finite element method
Surface roughness
