Evaluation of Tungsten Vapor Behavior in Xenon Short Arc Lamp Using Numerical Simulation

In this study, a unified numerical simulation model was developed. A sub model of radiative heat transfer and tungsten evaporation, including transportation and adhesion, was added to an electromagnetic and thermal fl uid numerical simulation model of a xenon short arc lamp. Then, the process of blackening by tungsten vapor was studied. When the temperature of the anode is around melting point, the heat loss of the evaporation against the input power is small. It is clear that there is almost no thermal in fl uence on the anode. In addition, the fl ux of vapor deposition in this numerical simulation is high, then the blackening of the lamp was con fi rmed. Furthermore, the process of blackening by tungsten vapor was also con fi rmed. This numerical simulation model is shown to be useful for the examination of arc fl ow control and blackening.