点击查看下载LaVisionFlowMaster-TR时间分辨粒子成像测速系统(TR-PIV) 高速抛射体穿透沙层的实验研究相关资料,进一步了解产品。
The dynamics associated with a long rod projectile, travelling at high velocity, penetrating a
heterogeneous target has long been an active research area. Historically both analytic and
numeric models have assumed a continuous target medium in order to predict the performance of the penetrator-target system, even in cases where the target is composed of concrete, foam or a granular porous medium such as sand. Continuum models fail to capture the complicated grain level response within the heterogeneous target which can result in asymmetric loading of the projectile leading to variations in projectile performance. In this work a series of experiments were conducted in order to investigate the penetration dynamics of loose sand, specifically with a goal of building a better understanding of the grain level dynamics. High speed photography coupled with a particle image velocimetry (PIV) technique were used to capture both the grain level and bulk response of the penetration event. Experiments were conducted over a velocity range of 30 to 100 m/s using both cylindrical and spherical projectiles. The results indicate that variations in the projectile size and shape effect cavity formation and that cavity formation occurs nearly 25 times slower than the projectile velocity.
FlowMaster High-Speed 系统为流体动力学分析提供了新的研究手段。它同时提供了基于数字PIV的空间流场信息和每一点随时间的演化信息。
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