Analysis of Influence Factors of Underwater Motor Temperature Field Based on Magneto-thermal-flux Coupling

Abstract

The computation domain of the temperature field of submersible motor is numerically solved using the finite volume method (FVM). Firstly, the change law of the loss is obtained by loss calculation. The loss heat source analysis result is applied as the boundary condition using the method of magneto-thermal-flux coupling. Then, based on the inlet temperature variation which is obtained according to the temperature drop between inlet and outlet, the influence of inlet temperature and inlet velocity variation on the motor temperature is analyzed. The absolute error between simulation results and test results is 5%. The importance of temperature analysis of the motor considering the change of inlet temperature is explained by experiments. The temperature distribution of the motor is obtained under the condition of local variation of internal flow field based on the above results of analysis and experiments, which show that the motor temperature is obviously reduced by increasing the number of flow paths. The results obtained in this paper can provide support for the optimization of the circulatory system.