Heat Transfer during High-Intensity Beam Drilling

• Main Authors: Horng, Fon-Sen, 洪豐盛
• Other Authors: Wei, Peng-Sheng
• Format: Others
• Language: en_US
• Online Access: http://ndltd.ncl.edu.tw/handle/39414237050774113542

碩士 === 國立中山大學 === 機械工程研究所 === 84 === An axisymmetric, unsteady model of energy of transpot in the workpiece is numerically investigated . The energy flux into a cavity of a paraboloid of revoluaion is of a Gaussian distribu- tion. Usint a Monte Carlo method energy absorbed by the wall af- ter experiencing specular and diffuse reflections is determined. An enthalpy formation of the energy equation in the workpiece is used so that the molten and soild regions can be calculated. The results show the effects of radiative properties on transport processes in the workpiece.