Determination of shock wave propagation properties from explosions using available flow diagnostic techniques are difficult. The non-isentropic nature of the flow implies that properties like over pressure, density and velocity have to be measured independently. Further, the variation of the flow field in both spatial and temporal coordinates causes severe limitations on the technique applied. udRecent efforts at documenting this flow using conventional schlieren and comparison with numerical simulation show the complexity of the flow which shows a modified precursor kind of flow behaviour. Efforts to quantify the velocity flow field are hampered by the difficulty in seeding such flows. The Background oriented schlieren (BOS) offers a non-intrusive measurement way to quantitatively capture the density field. Earlier attempst with BOS succeded in capturing the instantaneous density field measurement results at discrete time instants. However, this does not allow a full description of the time evolution of the flow. This study attempt to carry out BOS measurements using a high speed camera running at 100000 frames/sec. This implies a that the density field would be available after every 5mm (approx.) of movement. ud
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机译：使用现有的流量诊断技术很难确定爆炸引起的冲击波传播特性。流动的非等熵性质意味着必须独立测量超压，密度和速度等特性。此外，流场在空间和时间坐标上的变化导致对所应用技术的严格限制。 ud使用常规schlieren记录此流的最新努力以及与数值模拟的比较显示了流的复杂性，这显示了改进的前体流行为。难以对速度流场进行量化的努力因播种此类流的困难而受到阻碍。面向背景的纹影（BOS）提供了一种非侵入式的测量方式来定量捕获密度场。 BOS的早期尝试成功地在离散时刻捕获了瞬时密度场测量结果。但是，这无法完整描述流的时间演变。这项研究尝试使用以100000帧/秒的速度运行的高速相机进行BOS测量。这意味着每移动5毫米（大约）后，密度场将可用。 ud
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