涡流管内温度分布试验研究

涡流管内气体能量分离过程的突出表现是温度沿轴向、径向的分布,因而获得管内温度场分布是揭示涡流管内气体能量分离物理机制的首要问题和关键问题.根据管内三维强旋转流场特点,设计涡流管测温方案,利用自制微型热电偶对其内部温度场进行试验测量,获得了不同冷气流率条件下的温度场分布特性.研究表明:所制作的微型热电偶能够满足试验要求,试验结果能够很好地反映涡流管内温度场的分布规律,从而为进一步深入研究涡流管的能量分离机理创造条件.

Experimental Investigations of Temperature Distributions in a Vortex Tube

The temperature distributions in both the axial and radial direction are the primary characteristics when the energy separation effect of compressible air with strong swirl occurs inside the vortex tube, acquisitions of the temperature distribu- tions inside the vortex tube are the principal and key problem for disclosing the fundamental mechanism underlying the energy separation effect inside the tube. In order to measure the temperature distribution within the vortex tube, the program of measuring temperature using micro-thermocouples is designed according to the features of high swirling motions. The axial and radial gradients of the temperature distribution at the different cold air fraction are obtained by utilizing miniature thermocouple probes to measure the temperature at different axial and radial positions inside the tube. The present studies show that the self-made micro-thermocouples meet the experimental requirements very well and the temperature profiles from experiments are shown to agree accurately with the previous studies, which provide a credible means for further study on the physical mechanisms of the energy separation effect inside the vortex tube.