Thermoacoustically Driven Pulse Tube Coolers with Acoustic Amplifiers
Thermoacoustically Driven Pulse Tube Coolers with Acoustic Amplifiers
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DOI：
10.1063/1.2202581
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发表时间：
2006-05
期刊：
影响因子：
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通讯作者：
J. Y. Hu;W. Dai;E. Luo
中科院分区：
文献类型：
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作者：
J. Y. Hu;W. Dai;E. Luo
在以往的热声驱动脉冲管制冷机中，制冷机直接连接到热声发动机，连接管尽可能短，以减少功耗。这种耦合方法限制了冷却器可用的压力波的幅度，这又限制了可获得的最低温度。通过我们的分析，如果我们使用一个长度相当于四分之一波长的连接管，来自热声发动机的压力波将被大大放大，并驱动冷却器达到更低的温度。在热声驱动的单级和两级脉管制冷机上进行了实验，并成功地证明了这一思想的有效性。在单级和两级脉冲管冷却器上分别获得了1.3和1.24的压力比，这远高于热声发动机本身提供的1.1和1.13的压力比。随着放大的压力比，空载最低温度...
In previous thermoacoustically driven pulse tube coolers, the coolers are directly connected to the thermoacoustic engines with connecting tubes as short as possible for less power dissipation. This coupling method limits the amplitude of the pressure waves available to the coolers, which in turn limits the lowest obtainable temperatures. Through our analysis, if we use a connecting tube with length comparable to one quarter wavelength, the pressure wave coming from the thermoacoustic engine will be greatly amplified and drive the cooler to reach a much lower temperature. Experiments have been done on thermoacoustically driven single‐stage and two‐stage pulse tube cooler and successfully proved the effectiveness of this idea. The pressure ratios of 1.3 and 1.24 were obtained on the single‐stage and two‐stage pulse tube coolers, respectively, which are much higher than the pressure ratios of 1.1 and 1.13 provided by the thermoacoustic engine itself. With the amplified pressure ratio, the no‐load lowest tem...