Numerical Calculation And Simulation On Heat Transfer Characteristics Of Gasar Porous Metal Materials

Gasar porous metal material as the novel materials combine the structure and function inone, on the one hand, directional pore structure reduced its quality, thus greatly savingmaterials; On the other hand, increased its surface area a few tens or even hundreds of times,which improves its diathermanous performance remarkably. The patent preparation techniqueof Gasar porous metal material is well developed, but theoretical analysis and optimizationdesign are urgently needed from the perspective of diathermanous performance of the porousstructure, thereby the industrialization of the Gasar porous heat exchanger to give theoreticalguidance.In this thesis, the structural characteristic of Gasar porous metal material is illuminated,firstly. Then, the diathermanous model of Gasar porous metal material is induced withopening and closing styles. Finally, according to the diathermanous model, the diathermanousperformance of Gasar porous metal material is calculated in numerical method and simulatedby computer. The research details are as follows:Firstly, the diathermanous performance is analyzed for opening and closing porousmaterials, and their virtues and defects are reviewed from diathermanous performance. SoGasar porous metal material is put forward for its excellent capabilities. Multi-scale method isthe essence during analyzing for the diathermanous performance of porous materials.Secondly, according to the structural characteristic of opening and closing Gasar porousmetal materials, their diathermanous models are built in unit substance respectively.Therefore their equivalent diathermanous coefficients are gained based on thermal resistance.Finally, opening and closing Gasar porous metal materials are set up by diathermanousmodels in finite element method according to their structural characteristics. Theirdiathermanous performances are analyzed using ANSYS. The analysis result shows that: fromdiathermanous models, a mass of heat energy in opening Gasar porous metal material can bedissipated by convective heat conversion of fluid in holes, and the greater the liquiddiathermanous coefficient is, the more heat energy that is brought out; Pore gradientdistribution has better diathermanous performance than the uniform distribution, from the heatsource side to the distal, porous heat exchanger porosity of Gasar arrangement should begradually sparse and aperture gradually decreases. The microscopically thermal resistance isbigger inclosing Gasar porous metal material, and the greater its holes are, the larger itsmicroscopically thermal resistance is, namely, the microscopically thermal resistance isinfluenced by obstructing substance.