Gas Friction Loss in Stator Ventilation Ducts of the Drive Motor for the Cooling Medium in a High-Temperature Gas-Cooled Reactor

The driving motor for the cooling medium in a high-temperature gas-cooled reactor is crucial for the coolant circulation in the reactor. This paper proposes a method for calculating the gas friction loss using Bernoulli's equation to study its effect on temperature rise in the motor. The ventilation network model of the motor was developed using the fluid network method, and a three-dimensional mathematical model of the stator was established by considering the relationships between the fluid velocity, temperature, and gas friction loss. The results of the ventilation system calculations were applied to the physical model as boundary conditions, and the distribution of the stator temperature was determined using the finite-volume method. The effect of the change in the stator ventilation structure on the gas friction loss distribution was studied. The calculated friction losses accorded well with the values obtained using the empirical formula for the gas friction loss.