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首页> 外文期刊>Journal of enhanced heat transfer >ENHANCEMENT OF COOLING CAPACITY OF A VORTEX TUBE
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ENHANCEMENT OF COOLING CAPACITY OF A VORTEX TUBE

机译：增强涡流管的冷却能力

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摘要

A vortex tube is a device that separates an incoming compressed gas into two streams, one having a lower temperature and the other having a higher temperature than the incoming gas. An experimental study on the vortex tubes having a different curvature was reported here with air as the working medium. With the increase in inlet pressure, the temperature separation and cooling capacity increased. Isentropic efficiency and cooling capacity as two performance parameters for a vortex tube were reported here. The U-shaped tube had better performance in terms of temperature separation and cooling capacity for the higher cold mass fraction at all inlet pressures. When compared to results reported by others, the use of the rectangular inlet instead of the circular inlet lead to better performance of the vortex tube. The plot of isentropic efficiency with respect to the cold mass fraction was flatter at low inlet pressure. Irrespective of the inlet pressure, the maximum isentropic efficiency for all types of tubes lies between 0.20 and 0.33. The flow visualization using dye was done on three different types of Perspex (R) tubes at low pressure. The curved and U-shaped tube had the larger number density of helices near the inlet, which resulted in higher temperature separation and subsequently cooling capacity in a vortex tube.
机译：涡流管是一种将进入的压缩气体分成两股气流的装置，其中一股的温度比进料的气体温度低，另一股的温度比进料的气体温度高。在此，以空气为工作介质，对曲率不同的涡流管进行了实验研究。随着入口压力的增加，温度分离和冷却能力增加。等熵效率和冷却能力是涡流管的两个性能参数。在所有入口压力下，对于较高的冷质量分数，U型管在温度分离和冷却能力方面均具有更好的性能。与他人报告的结果相比，使用矩形进气口代替圆形进气口可提高涡流管的性能。在低入口压力下，等熵效率相对于冷质量分数的曲线较为平坦。无论入口压力如何，所有类型的管子的最大等熵效率都在0.20和0.33之间。使用染料的流动可视化是在低压下在三种不同类型的Perspex（R）管上完成的。弯曲的U形管在入口附近具有较大的螺旋数密度，这导致较高的温度分离并随后在涡流管中具有冷却能力。

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