Heat Transfer Characteristics And Field Synergy Principle Analysis Of A New Closed-loop Oscillating Heat Pipe During The Working Process

Electronic equipment cooling problems affecting the life of the nation is more and more prominent, which seriously restricted the product service life and the use safety. In order to ensure the stability and reliability of the electronic devices in use, carry ing out heat related research is very necessary. Due to the product application environment, conditions and other factors in use, in the number of cooling equipments, the oscillating heat pipe with the utility model has the advantages of simple structure, good adaptability and high heat dissipation, which is considered as the most competitive equipment.This paper was based on the project [12JJ6044] of Natural Science Foundation of Hunan province. It was analyzed and studied more in-depth on the related theories of oscillating heat pipe which were on the basis of the existing basic theories, experiments and numerical simulations of oscillating heat pipe. It was also studied the working conditions and starting characteristics of the closed-loop oscillating heat pipe in the theory and experiments by numerical simulation method. The field synergy degree of adiabatic wall was analyzed in oscillation heat dissipation which could provide reference in the study of the radiation mechanism in the oscillating heat pipe.The main innovations and research work are as follows:(1) Through the two-dimensional simulation analysis by using the method the volume of fluid(VOF) on the starting characteristic of the traditional closed oscillating heat pipe, and experimental verification. It obtained the pressure distribution law and vapor flow distribution trend under different start-up vacuum degrees.(2) The study proposed and established a mathematical model of a new type of narrow tube closed-loop oscillating heat pipe. The comparisons of numerical simulation were carried out between the traditional oscillating heat pipe and narrow tube closed-loop oscillating heat pipe in the same diameter, thermal flow and boundary conditions. The temperature distribution characteristics, pressure distribution and fluctuation regularity, and vapor flow patterns of narrow tube closed oscillating heat pipe and traditional heat pipe were studied and analyzed.(3)By using the multi field synergy theory(FSP) to analyze the synergy of the velocity field and temperature field of oscillating heat pipe, it was obtained theconclusion that the synergy of the new type of narrow tube closed-loop oscillating heat pipe was better than the traditional one.