Abstract: In order to complete the optimization of its built-in fire scenario, FDS is used to analyze the temperature, visibility and smoke diffusion process, and the calculation results are output in the form of data, pictures and videos. Then, referring to the numerical simulation results, the VR scene is constructed and optimized to make the fire development process more scientific and realistic, and further enhance the user's sense of experience and immersion. At the same time, FDS numerical calculation can solve the problem of lack of real data in large scene fire, and provide technical support and data support for the optimization and upgrading of system.

Key words: fire scenario, fire science popularization, virtual reality, numerical simulation