高温热管传热特性实验研究

In order to study the heat transfer performance of the heat pipe under different working conditions and to provide a reference for the design of the heat pipe cooled reactor, this paper uses potassium as the heat pipe working liquid to conduct the experimental research on the influence factors on heat pipe heat transfer performance. The analysis results show that the increasing of the heating power is conducive to the improvement of the heat transfer performance. The increasing of the heating power causes both the evaporation and the vapor density to increase, which in turn strengthens the vapor heat transfer. With the inclination angle increasing, the instability of the liquid film in the condensation section increases, resulting in the heat transfer deterioration. With increased inclination angle, the gravity accelerates the backflow of liquid working fluid and thin the liquid film in the condensing section. So the heat transfer is enhanced. When the inclination angle increases, the equivalent thermal resistance of the heat pipe gradually increases and tends to be stable after exceeding a certain limit. The experimental results in this paper provide the data and theoretical support for the design optimization of alkali metal high temperature heat pipes.