Analysis of Fluid Velocity and Temperature Variation Characteristics in Boundary Layer of Transformer Wall

It is one of the important research contents to understand the fluid velocity and temperature variation characteristics of the boundary layer on the transformer wall in order to analyze the heat dissipation characteristics of the transformer. In this paper, a simplified analysis model of the boundary layer on the transformer wall is established, and the effects of flow velocity, temperature, ambient temperature and ambient convection heat transfer coefficient on the distribution of the fluid temperature boundary layer and velocity boundary layer on the transformer wall are simulated and analyzed. The simulation results show that the main influencing factors of the velocity boundary layer are the inflow temperature and velocity, and the temperature boundary layer is affected by the inflow temperature and velocity as well as the external environment. Given the external ambient temperature and convective heat transfer conditions, as well as the transformer load rate, the temperature and flow velocity of the near wall streamline point can be derived from the transformer shell temperature by combining the results of multiple physical field calculations.