Abstract: The curing process of mold that heats the composite by the mandrel inside the pipe with steam was studied in this paper. The principle of the process is introduced.The heat transfer model of the mandrel and the kinetic model of the steam flow inside the mandrel are established, Based on the standard k～ε turbulence model and the vapor-liquid two phase transition model, and the heating process under different pressures mandrel, the flow and heat transfer of steam inside the mandrel are simulated by using the software Fluent. According to the simulation results of the mandrel surface temperature distribution and change course, we analyzed the relationship between the vapor pressure of the flow field,temperature and other physical quantities. The research of thermal winding provides efficient method to realize the hot winding process,and provides theoretical foundation for the control parameter of the steam.

Key words: core mold, pressure, temperature, numerical simulation