Investigation On Heat Transfer Characteristic And 3D Animation Simulation Of Cryogenic Loop Heat Pipe

As the development and of Cryogenic Loop Heat Pipe (CLHP), the heat exchange in the porous wick of the evaporator and the environmental parasitics heat in the liquid line are the two most important influencing factors to CLHP throughout. So some investigations to these two chief problems were made in this thesis above all. In this part, it not only established an unsaturated three-layer model of the the porous wick of the evaporator, but also presented a flow and heat transfer model of the co-axial liquid line, which placing the main liquid return line inside the secondary pump line in a co-axial arrangement. With the porous wick model, the variation of the temperature and the velocity and the pressure of the work liquid in porous wick was described in detail by numerical calculating. Besides, in order to better reduce the parasitics heat of CLHP system, it analyzed the affection of the parasitics heat to the work liquid in the liquid return line with some different parameter, such as the different size of pipe and different capability of heat preservation.The other important part of this thesis was to achieve the 3D dynamic simulation of CLHP system. In this part, it chiefly used the method of computer simulation, which was described by both Visual C++ and OpenGL to show the whole dynamic process of CLHP system from start-up to running intuitionisticly according to the temperature of per node of CLHP system. Therefore, a transient mathematical model should be developed to obtain the temperature needed in the 3D animation simulation before.