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实验测量了脉冲管热端调相机构(气库+ 小孔或细管)在高频交变流动情况下的阻力特性,发现细管和小孔的流阻与速度成二次关系;细管或小孔前的压力波和质量流的相位差由热端结构和压缩机运行频率决定,该相位差不仅与热端中的抗性元件(气库和细管)有关,还与小孔或细管的流阻有关
The resistance characteristics of pulse tube hot end phase modulation mechanism (gas pool + small hole or thin tube) under alternating high-frequency flow were measured experimentally. It was found that the flow resistance of thin tube and small hole was a quadratic relationship with the speed. Or orifice before the pressure wave and mass flow phase difference between the hot end structure and the compressor operating frequency of the phase difference not only with the hot end of the resistance element (gas and thin tube) related to small holes or Thin tube flow resistance related