斯特林发动机由于其外部加热特性适合用于分布式供能系统而正在得到越来越多的重视。斯特林机运转时，其内部工质的压力传递变化特性决定了输出机械功率的大小。本文首先采用施密特分析法对自主研制的某型斯特林机在预充氦气压力为2MPa的工况下计算其压力的周期性变化情况，然后在同样的工况下用实验测试的方法研究工质在换热器系统内的压力传递变化特性。最后比较理论计算值与实验测试值得出，施密特分析法可以反映出斯特林机换热器系统内工质压力的真实变化情况，且叠网式的回热器结构是造成换热器系统内压力损失的主要因素之一。
The Stirling engine is receiving more and more attention due to its external heating character which is suitable for the micro-CHP system. When a Stirling engines is running, the output power depends on the pressure changing of its working fluids in the engine. This paper firstly analyses the pressure changing process of the internal working fluids in a cycle by using the Schmidt analysis method under the working condition that tile pressure of the pre-filled helium is 2 MPa. And then the pressure changing process of the working fluids Helium in the heat exchanger system of the Stifling engine is tested in the experiment. Finally, the experimental result shows the Schmidt analysis method could predict the real pressure changing character of the working fluids in the heat exchanger system of a Stirling engine by contrast to the theoretical analysis result, and it also shows the porous metal regenerator mainly causes the pressure loss of the working fluids in the heat exchanger system.
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