An Experimental Study on the Propagation Characteristics of the Shock Waves and Contact Surfaces in the Microscopic Channels

我们开发并评估了一种新颖的无图示出驱动部分。结果表明，这种新型驱动段非常适合于小直径激波管的激波产生。测量了小直径激波管末端的压力。从而证实了冲击波在直径为2~6 mm范围内的传播。此外，实验结果还显示了与理想理论的偏差。随着激波管直径的减小，偏差增大。此外，我们还开发了非接触式测量方法来阐明冲击波的传播特性。冲击波测量是在沿管道的任意测量位置进行的。实验结果表明，该方法在参数测量中是非常有效的，因为它可以检测到冲击波传播的速度和穿过冲击波的密度变化。

We developed and estimated a novel diaghragmless driver section. It is confirmed that the novel driver section is highly suitable for the shock wave generation in small diameter shock tubes. The pressure at the end of the small diameter shock tubes is measured. As a consequence, the shock wave propagation in the range from 2 to 6mm diameter is confirmed. Moreover, the experimental results show the deviation from the ideal theory. The deviation becomes increasing with decreasing the shock tube diameter. Additionally, we developed the contactless measurement method to clarify the characteristics of the shock wave propagation. The shock wave measurement is performed at arbitrary measurement position along the tubes. As a consequence, it is experimentally clarified that the developed method is very effective in the parametrical measurements, caused by that the velocity of the propagating shock wave and the density change across the shock wave can be detected.