激波驱动液体轴对称抛撒的实验研究

Experimental study of axisymmetrical dissemination of liquid driven by shock wave

设计了利用垂直激波管实现液体轴对称抛撒的实验装置,通过高速摄影技术获得不同驱动压力下气液界面不稳定性发展直至发生首次破碎的时间序列。实验结果表明,马赫数的增大导致初始扰动波的波长减小和扰动波数的增加,且尖钉发生破碎并与气流混合的程度更为剧烈。实验液体发生首次破碎的位置基本不随驱动压力的升高而改变。液体前锋的加速度曲线呈现出前期基本不变,后期迅速增大的趋势。

An experimental device for the axisymmetrical dissemination of liquid was set up.Applying the high-speed photography technology,the time series of the instability development at the gas/liquid interface and the primary breakup were recorded.The experimental results show that the increase of Mach number will lead not only to the decrease of the wavelength and the increase of the wave number of initial disturbance waves,but also to the degree of mixing of the spike and airflow.The positions of the primary breakup of the liquid don＇t change with the increase of the shock wave.The acceleration of the liquid front remains unchanged in the earlier stage and rises rapidly in the later stage.