不同于常规自然散热或机壳水冷电机，内潜水式电机直接采用水对电机内部进行冷却，因此存在整机流固共轭传热的强耦合。为提高电机的可靠性与安全性，流场与温度场耦合传热分析十分必要。针对某船用气隙水冷方式的内潜水式永磁电机，基于计算流体动力学(CFD)原理，对该电机三维流场与温度场进行数值仿真分析与几何结构改进，消除了电机内部流场出现的逆流现象，提高了整机的散热效率，优化了电机的流场与温升。所得结果对该型内潜水式电机的几何结构设计具有一定的参考意义。

Different from conventional natural cooling or housing water cooling motor, water is directly used by the internal submersible motor to cool the inside of the motor, which leads to the strong coupling of fluid-solid conjugate heat transfer of the whole machine. In order to improve the reliability and safety of the motor, the coupled heat transfer analysis of flow and temperature fields is very necessary. For a marine air-gap water cooling internal submersible permanent magnet motor, based on the principle of computational fluid dynamics (CFD), the three-dimensional flow and temperature fields are numerically simulated and the geometric structure is improved, eleminating the countercurrent phenomenon of the internal flow field of the motor, improving the heat dissipation efficiency of the whole machine, and optimizing the flow field and temperature rise of the motor. The result has a certain reference significance for the geometric structure design of the internal submersible motor.