Aerobreakup in Rarefied Supersonic Gas Flows
Aerobreakup in Rarefied Supersonic Gas Flows
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DOI：
10.1115/1.1777234
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发表时间：
2004-07
影响因子：
2
通讯作者：
T. Theofanous;G. -. Li;Truc-Nam Dinh
中科院分区：
文献类型：
--
作者：
T. Theofanous;G. -. Li;Truc-Nam Dinh
我们提出了新的实验结果的界面不稳定性和破碎的牛顿液滴突然暴露在稀薄，高速（马赫3）的空气流。实验方法允许第一次详细观察的界面现象和混合在整个破碎周期在很大范围内的韦伯数。关键发现是，瑞利-泰勒不稳定性单独是低粘度液体的自由韦伯数低至28的主动机制，并且剥离而不是刺穿是We→∞的渐近状态。这一点和其他超过26<We<2，600的详细视觉证据非常适合于测试计算流体动力学（CFD）模拟，以便在广泛的条件下基本了解空气制动。
We present new experimental results on the interfacial instabilities and breakup of Newtonian liquid drops suddenly exposed to rarefied, high-speed (Mach 3) air flows. The experimental approach allows for the first time detailed observation of interfacial phenomena and mixing throughout the breakup cycle over a wide range of Weber numbers. Key findings are that Rayleigh-Taylor instability alone is the active mechanism for freestream Weber numbers as low as 28 for low viscosity liquids and that stripping rather than piercing is the asymptotic regime as We→∞. This and other detailed visual evidence over 26<We<2,600 are uniquely suitable for testing Computational Fluid Dynamics (CFD) simulations on the way to basic understanding of aerobreakup over a broad range of conditions