Simulation of Atmospheric Flow Characteristics and Selection of Models for Artificial Simulated Fog-Haze Environment

The devices for artificial flashover experiment should be constructed and the stability of the airflow field is the key to construct it. This work presents a methodology of constructing three models respectively without blades, with straight blades and with curved blades, coupled for artificial simulated fog-haze environment with computational fluid dynamics (CFD), to predict the impact of the rotating blades on the flow velocities in the enclosed environment by simulation. Atmospheric flow characteristics and variation of flow velocities were analyzed, and the influences of different rotating blades on flow velocities were compared to get the related simulation results in three models. It is showed that the flow velocities increase with the increase of device's Y coordinate. Compared with the variation of flow velocities in the model without blades, it is confirmed that the variation of flow velocities in two models with blades is reduced relatively, in which the variation of flow velocities in the model with straight blades is lower and more stable. Therefore, the designed model with straight blades will be developed for artificial flashover experiment.