Method of obtaining spherical converging shock wave

Abstract

The invention discloses a method of obtaining a spherical converging shock wave. The method is based on a synchronous ignition device. Plane detonation waves moving towards each other in opposite directions are formed on both ends of a straight round pipe. After smooth detonation is achieved, the plane detonation waves simultaneously enter an axisymmetric convergence compression profile designed on the basis of characteristic lines. A spherical to-be-shocked sample is disposed near a convergent point. Cone-ball-shaped detonation waves moving in opposite directions are subjected to secondary shaping, then form approximately semispherical convergence, and then reach the surface of the sample at the same time; shock wave transmission happens; and spherical converging shock wave is obtained in the spherical sample and converges to the center of the sphere. By adjusting the intensity of the detonation waves and the geometrical conditions of the convergence area, the method can provides Gpa magnitude spherical converging shock wave conditions. The invention provides the novel spherical converging shock wave generating method which enables the convergence center to reach an ultra-high pressure limit state.

Description

technical field [0001] The invention belongs to the technical field of explosion and impact dynamics, and in particular relates to a method for obtaining spherical converging shock waves. Background technique [0002] Inertial confinement nuclear fusion, supernova explosion, nuclear engineering and other fields all involve the dynamics of spherical shock wave convergence, and there are still many difficult problems to be studied in the evolution of the material interface and the interaction mechanism. At present, the main methods for directly generating spherical converging shock waves are: [0003] 1) Based on spherical shell-shaped explosives, the method of synchronous ignition on the outer spherical surface. [0004] 2) A method based on direct simultaneous ignition of explosive premixed substances on the inner wall of a spherical container. [0005] 3) Method based on multi-channel laser convergent impact. [0006] Among the above methods, 1) and 2) both involve diffi...

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Problems solved by technology

[0006] Among the above methods, 1) and 2) both involve difficult problems such as synchronous spherical ignition, and it is difficult to generate a more accurate spherical shock wave

Method 3 needs to undergo synchronous convergence of multiple lasers, and at the same time requires sufficient energy and high test costs, which is difficult to use as a conventional test technique

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