Vortex tubes of different length were developed and the effect of the length on the performance of vortex tube was investigated by experiment with air as medium.
研制了不同热端管长度的涡流管，并以空气作为工作介质，通过实验研究了热端管长度对涡流管能量分离性能的影响。
Results show that gas expansion in central region of vortex chamber caused by swirling flow is an important reason for the refrigerating effect of vortex tube.
结果表明：涡流导致涡流室中心区域气流膨胀是涡流管产生制冷效应的一个重要原因。
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