Analyses of high temperature heat pipe startup from the frozen state: Part II - closed-form analytical solutions and frozen startup limitation
Conference
Cao, Y, Faghri, A. (1992). Analyses of high temperature heat pipe startup from the frozen state: Part II - closed-form analytical solutions and frozen startup limitation
. 206-3 105-113.
Cao, Y, Faghri, A. (1992). Analyses of high temperature heat pipe startup from the frozen state: Part II - closed-form analytical solutions and frozen startup limitation
. 206-3 105-113.
The numerical and experimental results of Part I of this paper 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 provide 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.
