Experimental Investigation of Mixing at Tilted Interface Induced by Rayleigh-Taylor Instability
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摘要: 实验研究了不相溶流体斜界面Rayleigh-Taylor（R-T）不稳定性湍流混合区的混合不对称性特征。利用高压气体加速装有不同液体的箱体，加速度方向由轻液体指向重液体，此时界面是R-T不稳定性的。利用阴影测试技术，研究了初始倾角9的ZnCl2溶液/正己烷斜界面的演化规律，得出混合区内混合不对称、斜界面倾角渐增的规律。
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关键词:
- Rayleigh-Taylor不稳定性 /
- 湍流混合区 /
- 阴影
Abstract: Experiments were performed to investigate dissymmetry of Rayleigh-Taylor (R-T) instability of immiscible liquid initialized with a oblique initial interface. High pressure gas was used to accelerate a container filled with various liquid, the direction of acceleration from the lighter liquid to the heavy liquid, at the moment the interface is instability. The results of tilted angle 9 interfacial (ZnCl2 solution/Hexane) evolution and mixing, were obtained from flow visualization experiments by the shadowgraph method. The obtained experimental result indicated that mixing ratio of TMZ is dissymmetry and the interfacial tilted angle is increased.-
Key words:
- Rayleigh-Taylor instability /
- turbulent mixing zone /
- shadowgraph method
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Мешков Е Е. Исследования Гидродинамических Неустойчивостей в Лабораторных Экспериментах [M]. Саров: ФГУП РФЯЦ-ВНИИЭФ, 2006: 3-5. (in Russia) Atzeni S, Meyer-ter-Vehn J. The Physics of Inertial Fusion [M]. Translated by Shen B F. Beijing: Science Press, 2008: 198-253. (in Chinese) Atzeni S, Meyer-ter-Vehn J. 惯性聚变物理 [M]. 沈百飞, 译. 北京: 科学出版社, 2008: 198-253. Read K I. Experimental investigation of turbulent mixing by Rayleigh-Taylor instability [J]. Physica D, 1984, 45(12): 45-58. Kucherenko Y A, Balabin S I, Ardashova R I, et al. Experimental study of the influence of the stabilizing properties of transitional layers on the turbulent mixing evolution [A]//IWPCTM8 [C]. Pasadena, 2002: 37-38. Dimonte G, Ramaprabhu P, Andrews M. Rayleigh-Taylor instability with complex acceleration history [J]. Phys Rev E, 2007, 76(4): 1-6. Dalziel S B, Linden P F, Youngs D L. Self-similarity and internal structure of turbulence induced by Rayleigh-Taylor instability [J]. J Fluid Mech, 1999, 399(1): 1-48. Holford J M, Dalziel S B, Youngs D L. Rayleigh-Taylor instability at a tilted interface in laboratory experiments and numerical simulations [J]. Laser and Particle Beams, 2003, 21(3): 419-423. Невмержицкий Н В, Разин А Н, Сотсков Е А. Развитие турбулентного перемешивания на границе газ-жидкость при изменении числа атвуда от +0. 9 до -0. 2 [A]//ⅨЗабабахинские Научные Чтения [C]. Снежинск, 2007: 45-46. (in Russia) -
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