Numerical Simulation of Contact Point Temperature Distribution and Fire Mechanism Analysis

This paper is mainly about the numerical research for contact point temperature distribution in the condition of short circuit, overload and poor contact. The computational fluid dynamics method is used to research the feature of convective heat transfer between copper bars and air. Then the convective heat transfer coefficient is obtained from Fluent as thermal boundary condition of Ansoft for temperature field analysis. This simulation results indicate that the temperature distribution of contact point is different under the different conditions. The regulations and characteristics can be summarized from the internal or external heat, average temperature and the hottest point through the observation. And the cause of fire is obtained by combining with the metallographic analysis.