With the development of aerospace technology, many precision electronic devices used in aerospace equipment are becoming highly integrated, which leads to high heat flux and other problems. In addition, the thermal control system of aerospace equipment needs to meet additional requirements such as being able to adapt to complex environment, which also poses new challenges to the field of aerospace thermal control technology. As a kind of efficient heat transfer structure, heat pipe is used more and more in the field of aviation air cooling.
Based on the vein transmission path, a flat heat pipe with a fractal channel capillary core is designed in this paper. The fractal channel capillary core has a faster suction rate and higher suction mass, so as to improve the overall performance of the heat pipe. The heat transfer performance of the heat pipe and the influence of various parameters on its overall performance were studied through simulation and experiment. Meanwhile, the method of optimizing the suction performance of the channel was explored through visualization research. The main contents of this paper include:
(1) In the aspect of simulation, the three-dimensional model and theoretical calculation model of flat heat pipe are established to verify the feasibility of flat heat pipe with fractal groove capillary core. The simulation results show that the groove structure, fractal Angle and vapor chamber height all have a certain influence on the performance of heat pipe, and there is a certain parameter value that makes the performance of heat pipe reach the best.
(2) In terms of experimental research, two versions of experimental pieces were designed and made, and a test platform was built to explore the influence of different heating power on the performance of heat pipes. Based on the research results, a new experimental piece was optimized and designed. The new experimental piece has a smaller channel length and width, and the influence of different heating power, liquid filling rate and tilt Angle on the optimized heat pipes was explored.
(3) In terms of visualization research, the impact of condensation methods on the refrigerant condensation process was studied, and the refrigerant flow in heat pipes under different conditions and the suction of each stage of the channel were studied. The visualization experimental results were used to optimize the size of each stage of the channel.
谷歌
火狐
