Streaming from the hot end to the cold end of the regenerator was found which would waste much useful heating energy . modified structure of the jet pump could control this sort of streaming efficiently 实验中还观察到了直流现象，气体从回热器热端向冷端运动，造成大量的能量浪费，通过改进喷射泵结构可以有效抑制直流。
