中国物理B ›› 2004, Vol. 13 ›› Issue (10): 1747-1752.doi: 10.1088/1009-1963/13/10/031

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RT instability in cylindrical implosion of jelly ring

杨礼兵, 廖海东, 孙承纬, 欧阳凯, 李军, 黄显宾   

  1. Institute of Fluid Physics, CAEP, P.O. Box 919-108, Mianyang 621900, China
  • 收稿日期:2003-03-07 修回日期:2004-05-14 出版日期:2004-10-20 发布日期:2005-06-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10035030).

RT instability in cylindrical implosion of jelly ring

Yang Li-Bing (杨礼兵), Liao Hai-Dong (廖海东), Sun Cheng-Wei (孙承纬), Ouyang Kai (欧阳凯), Li Jun (李军), Huang Xian-Bin (黄显宾)   

  1. Institute of Fluid Physics, CAEP, P.O. Box 919-108, Mianyang 621900, China
  • Received:2003-03-07 Revised:2004-05-14 Online:2004-10-20 Published:2005-06-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10035030).

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摘要： The interfacial RT instability experiments on imploding jelly liners in cylindrically convergent geometry have been performed. The liner's instability growth was observed clearly with a high-speed framing camera. Jelly liners have different initial perturbation forms on their inner and outer interfaces, being either smooth or sinusoidal. The initial perturbations also have different magnitudes and spatial frequencies (for example, mode n=5, 10, 20). The experimental results show that the growth and coupling of perturbations on inner and outer surfaces are remarkably different. Meanwhile, the relevant 2-D numerical simulation of hydrodynamics combined with Level Set method has been performed. Using the numerical code, we can design the parameters of imploding jelly liner, and predict the experimental results. The results of simulation are demonstrated to be in good agreement with the measured data in a series of experiments.

关键词: hydrodynamic instability, perturbation, jelly ring

Abstract: The interfacial RT instability experiments on imploding jelly liners in cylindrically convergent geometry have been performed. The liner's instability growth was observed clearly with a high-speed framing camera. Jelly liners have different initial perturbation forms on their inner and outer interfaces, being either smooth or sinusoidal. The initial perturbations also have different magnitudes and spatial frequencies (for example, mode n=5, 10, 20). The experimental results show that the growth and coupling of perturbations on inner and outer surfaces are remarkably different. Meanwhile, the relevant 2-D numerical simulation of hydrodynamics combined with Level Set method has been performed. Using the numerical code, we can design the parameters of imploding jelly liner, and predict the experimental results. The results of simulation are demonstrated to be in good agreement with the measured data in a series of experiments.

Key words: hydrodynamic instability, perturbation, jelly ring

中图分类号:  (Interfacial instabilities (e.g., Rayleigh-Taylor))

  • 47.20.Ma
47.11.-j (Computational methods in fluid dynamics)