CLOSED-FORM ANALYTICAL SOLUTIONS OF HIGH-TEMPERATURE HEAT PIPE STARTUP AND FROZEN STARTUP LIMITATION

被引：48

作者：

CAO, Y

FAGHRI, A

机构：

[1] Department of Mechanical and Materials Engineering, Wright State University, Dayton, OH

来源：

JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME | 1992年 / 114卷 / 04期

关键词：

HEAT PIPES AND THERMOSIPHONS; TRANSIENT AND UNSTEADY HEAT TRANSFER;

D O I：

10.1115/1.2911873

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Previous numerical and experimental studies indicate that the high-temperature heat pipe startup process is characterized by a moving hot zone with relatively sharp fronts. Based on the above observation, a flat-front model for an approximate analytical solution is proposed. A closed-form solution related to the temperature distribution in the hot zone and the hot zone length as a function of time are obtained. The analytical results agree well with the corresponding experimental data, and pro vide a quick prediction method for the heat pipe startup performance. Finally, a heat pipe limitation related to the frozen startup process is identified, and an explicit criterion for the high-temperature heat pipe startup is derived. The frozen startup limit identified in this paper provides a fundamental guidance for high-temperature heat pipe design.

引用

页码：1028 / 1035

页数：8