Thermal Resistances of Circular Source on Finite Circular Cylinder With Side and End Cooling
Thermal Resistances of Circular Source on Finite Circular Cylinder With Side and End Cooling
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DOI：
10.1115/1.1568124
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发表时间：
2003-06
影响因子：
1.6
通讯作者：
M. Yovanovich
中科院分区：
文献类型：
--
作者：
M. Yovanovich
给出了均匀端面冷却的有限长圆柱体上圆形热源的热扩散和系统热阻的一般解。该解适用于一般的轴对称热流密度分布，可归结为三种重要的热流密度分布：等温流密度分布和等效等温流密度分布。无量纲系统阻力取决于四个无量纲系统参数。结果表明，许多研究者提出的几个特例直接来自于一般解。对于系统阻力只与一个系统参数有关的几种情况，给出了表格值和关联式。当圆柱体两侧为绝热时，系统阻力等于一维阻力加上扩散阻力。当气缸很长且侧冷却较小时，一般关系简化为具有端部冷却和底部扩散阻力的延伸表面(销钉)的情况。给出了极薄无限大圆盘上等效等温圆形源的特例。@doi：10.1115/1.1568124#
General solution for thermal spreading and system resistances of a circular source on a finite circular cylinder with uniform side and end cooling is presented. The solution is applicable for a general axisymmetric heat flux distribution which reduces to three important distributions including isoflux and equivalent isothermal flux distributions. The dimensionless system resistance depends on four dimensionless system parameters. It is shown that several special cases presented by many researchers arise directly from the general solution. Tabulated values and correlation equations are presented for several cases where the system resistance depends on one system parameter only. When the cylinder sides are adiabatic, the system resistance is equal to the one-dimensional resistance plus the spreading resistance. When the cylinder is very long and side cooling is small, the general relationship reduces to the case of an extended surface (pin fin) with end cooling and spreading resistance at the base. The special case of an equivalent isothermal circular source on a very thin infinite circular disk is presented. @DOI: 10.1115/1.1568124#