运用计算流体力学(CFD)方法对斯特林发动机气缸内部工质的流场进行了数值模拟.应用FLUENT软件,采用标准的κ-ε模型、使用动网格模拟发动机活塞的往复运动.计算结果表明:发动机气缸内部流场极其复杂,膨胀腔和压缩腔内的速度场、压力场以及温度场随活塞运动动态变化,回热器内温度和速度呈线性分布.该方法为气缸结构的优化设计提供了理论依据. The CFD method was used to simulate the flow field inside the cylinder of Stirling engine.Using FLUENT software, a standard κ-ε model was used to simulate the reciprocating motion of engine pistons. The results show that the flow field inside the engine cylinder is extremely complicated, the velocity field, pressure field and temperature field in the expansion chamber and compression chamber change dynamically with the piston motion, and the temperature and velocity in the regenerator are linearly distributed. Provided a theoretical basis.