The instability under an acceleration of the fluid system in the direction toward the denser fluid is generally known as Rayleigh-Taylor (RT) instability. In particular, this kind of RT instability is also called Magneto Rayleigh-Taylor (MRT) instability when the the light fluid is in a magnetic field. There are many factors affecting the development of RT instability, among which the most important factors include material strength and geometry. In this paper, the development and evolution of RT instability under cylindrical implosion loading of different material combinations are studied experimentally. The experiment is carried out on FP-1 device, which is a long pulse and high current device, and is very suitable for electromagnetic driven solid sleeve implosion loading experiment. It is composed of two-stage Marx, and the experimental loading current is about 2MA. The experimental results show that under the effect of cylindrical convergence, the initial disturbance wavelength has obvious influence on the disturbance development, and the larger the wavelength, the faster the disturbance growth. Disturbance development between multilayer media is the result of comprehensive influence of physical factors such as initial wavelength, density and intensity ratio.

Rayleigh Taylor instability,FP-1