Thermal Behavior of Axial Groove Heat Pipe under Gravity: Dependence of Groove Shape and Orientation

摘要

This paper presents the experimental results of two kinds of axially-grooved-heat-pipes(AGHPs): The one has Ω shape grooves and the other has rectangular shape grooves. TheseAGHPs have been used as heat transfer devices of spacecraft. Before the launch of a heatpipe, it should work on the ground and be confirmed its thermal performance. It isimportant to understand the behavior of the heat pipe under the force of gravity. We studiedthermal behavior of an Ω groove AGHP and a rectangular groove AGHP on the ground inlow temperature(213K). At low heat load, we observed different behavior between the ΩAGHP and the rectangular AGHP. We observed the ‘effective length’ depends on a heatingpoint and a tilt angle of the heat pipe. In the ground test, we have to pay attention to the heatposition to check whether the heat pipe works appropriate.