Study of the shock-induced acceleration of hexane droplets
Study of the shock-induced acceleration of hexane droplets
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DOI：
10.1007/s00193-008-0184-4
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发表时间：
2009-02
期刊：
影响因子：
2.2
通讯作者：
A. Kobiera;J. Szymczyk;P. Wolański;A. Kuhl
中科院分区：
文献类型：
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作者：
A. Kobiera;J. Szymczyk;P. Wolański;A. Kuhl
对冲击波与正己烷液滴的相互作用进行了实验研究。实验的主要目的是记录该过程的图像，并测量描述被空气中传播的冲击波吞没的液滴的运动、分散和蒸发的基本参数。本研究使用了一个带有可视化部分的激波管。通过拍摄这一过程，人们可以测量相互作用过程产生的雾云的位置、速度和大小。对图像的分析表明，不同尺寸的液滴在不同情况下没有质的差异，但冲击马赫数对过程有显著影响。定量分析表明，在一定条件下，分散体发生灾难性破碎。液滴在与周围气体达到机械平衡之前被粉碎成雾云。燃料液滴完全分散和加速所需的时间约为300 ~ 500 μs，与液滴直径和激波速度有关。分散时间主要由液滴直径控制，并且在较小程度上由冲击马赫数控制。
An experimental study of the interaction of a shock wave with a hexane droplet is presented. The main goal of the experiments was to record images of the process and measure basic parameters describing movement, dispersion and evaporation of the droplets engulfed by a shock wave propagating in air. A shock tube with a visualization section was used for this research. Photography of the process allowed one to measure the positions, velocities and sizes of mist clouds created by the interaction processes. Analysis of the pictures shows that there is no qualitative difference between cases for different size droplets, but shock Mach number had a significant effect on the process. Quantitative analysis shows that under certain conditions, a catastrophic breakup mechanism of dispersion occurred. The droplets are shattered into a mist cloud before they achieve mechanical equilibrium with the surrounding gas. The approximate time for the complete dispersion and acceleration of the fuel droplet varies from 300 to 500 μs, and depends both on the droplet diameter and shock velocity. The dispersion time is controlled principally by the droplet diameter, and to a lesser extent, the shock Mach number.