A Study on the interaction of shock tube-generated blast waves with a circular object at different pressure ratios

IF 2.5 3区 工程技术 Q2 MECHANICS European Journal of Mechanics B-fluids Pub Date : 2024-10-07 DOI:10.1016/j.euromechflu.2024.10.001
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Abstract

The interaction of high peak overpressure blast waves with a circular object placed at two different axial locations from the shock tube exit is studied through numerical simulation using an in-house developed multi-component Navier–Stokes solver. The driver and driven sections of the shock tube were 0.8 m and 6 m, respectively. Helium is used in the driver section, while atmospheric air is used in the driven section and outside the shock tube. The evolution of blast waves inside an open-ended shock tube and its interaction with a rectangular object is reported in Murugan et al.. (2022). Here, the blast wave interacting with a circular object is examined for diaphragm pressure ratios of 13 and 57 by placing the objects at 250 mm and 500 mm from the shock tube exit. The flow field is evaluated through numerical Schlieren, vorticity, density, pressure plots, and the enstrophy plot, which shows the vortical structures that originated in the flow field. The blast load acting on the circular object is calculated for two diaphragm pressure ratios and axial locations. This study helps understand the reflection and diffraction of blast waves and associated flow fields around circular objects used in blast wave attenuation.
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关于冲击管产生的爆炸波在不同压力比下与圆形物体相互作用的研究
通过使用内部开发的多分量纳维-斯托克斯求解器进行数值模拟,研究了峰值超压冲击波与位于冲击管出口两个不同轴向位置的圆形物体之间的相互作用。冲击管的驱动部分和从动部分分别为 0.8 米和 6 米。驱动部分使用的是氦气,而从动部分和冲击管外部使用的是大气空气。Murugan 等人报告了开口式冲击管内爆炸波的演变及其与矩形物体的相互作用(2022 年)。(2022).在此,通过将物体放置在距离冲击管出口 250 毫米和 500 毫米的位置,研究了在膜片压力比为 13 和 57 时,冲击波与圆形物体的相互作用。流场通过数值 Schlieren、涡度、密度、压力图和 enstrophy 图进行评估,enstrophy 图显示了源自流场的涡旋结构。针对两种隔膜压力比和轴向位置,计算了作用在圆形物体上的爆炸载荷。这项研究有助于了解爆炸波的反射和衍射以及用于爆炸波衰减的圆形物体周围的相关流场。
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来源期刊
CiteScore
5.90
自引率
3.80%
发文量
127
审稿时长
58 days
期刊介绍: The European Journal of Mechanics - B/Fluids publishes papers in all fields of fluid mechanics. Although investigations in well-established areas are within the scope of the journal, recent developments and innovative ideas are particularly welcome. Theoretical, computational and experimental papers are equally welcome. Mathematical methods, be they deterministic or stochastic, analytical or numerical, will be accepted provided they serve to clarify some identifiable problems in fluid mechanics, and provided the significance of results is explained. Similarly, experimental papers must add physical insight in to the understanding of fluid mechanics.
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