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In the cylindrical implosion problem, the phenomenon of colliding bulge and surface micro-jet formation of two-layer metal flyers, which are driven by two slip detonations in opposite direction of the pole, is studied by simulation using Euler's program. Simulation results of the inner surface travel times of the lead flyer coincide well with the experimental results. In the polar position, there is a fracture cavity in the lead flyer, and a blunt bulge is formed on the inner surface. At the equator, large-scale fracture particles are generated as the inner surface of the lead flyer is growing. It is considered that the colliding bulge at the equator which seem to be continuous in the X-ray images is actually discontinuous, and it is composed of large-scale fracture particles and small-scale micro-jet particles. By analysis of the inner surface position on the optical images at different times, the maximum velocity of the lead micro-jet particles is obtained. It is found that the maximum velocity of the micro-jet particles is declined in the pole region, but at the equator its maximum velocity is increased with time. It is considered that the subsequent loading waves on the colliding bulge area may cause higher speed of micro-jet particles than the first loading wave. And then, the groove micro-jet model of the lead, which is loaded by impact, is used to be equivalent to the uniform disfigurement surface micro-jet. It is proved that both the micro-jet maximum velocity in the pole region and the velocity at the equator can be formed by the same uniform disfigurement surface, and the correctness of the experimental optical image is also verified. Finally, the restrained method of the colliding bulge and surface micro-jet in this problem is studied by simulation. The micro-jet maximum velocity of the lead flyer can be declined by changing the two opposite initiation points to the points close to the metal flyers in the pole region, and the main cause of collision bulge at the equator is that the Mach reflection is formed in the collision area because of the low sound velocity of lead.
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Keywords:
- detonation drive /
- colliding bulge /
- micro-jet /
- metal flyers
[1] Chandle E A, Egan P O, Stokes J 1999 UCRL134657
[2] Zhang C Y, Hu H B, Li Q Z 2009 Chin. J. High Pres. Phys. 23 283 (in Chinese) [张崇玉, 胡海波, 李庆忠 2009 高压 23 283]
[3] Zhang C Y, Hu H B, Li Q Z 2013 Chin. J. High Pres. Phys. 27 884 (in Chinese) [张崇玉, 胡海波, 李庆忠 2013 高压 27 884]
[4] Walsh J M, Shreffler R G, Willig F J 1953 J. Appl. Phys. 55 349
[5] Asay J R 1976 SAND76-0542
[6] Asay J R 1978 SAND78-1256,
[7] Asay J R 1978 J. Appl. Phys 49 6173
[8] Andriot P, Chapron P, Lambert V 1984 Shock Waves in Condensed Matter Santa Fe, New Mexico, July 18–21, 1983 p277280
[9] Remiot C, Chapron P, Demay B 1993 High Press. Sci. Tec. 2 1763
[10] Resseguier T, Signor L, Dragon A 2007 J. Appl. Phys 101 013506
[11] Wang P, Shao J L, Qin C S 2009 Act. Phys. Sin. 58 1064 (in Chinese) [王裴, 邵建立, 秦承森 2009 58 1064]
[12] Liu J, Wang Y J, Feng Q J 2014 Chin. J. High Pres. Phys. 28 346 (in Chinese) [刘军, 王言金, 冯其京 2014 高压 28 346]
[13] Liu J, He C J, Liang X H 2008 Chin. J. High Pres. Phys. 22 72 (in Chinese) [刘军, 何长江, 梁仙红 2008 高压 22 72]
[14] Lee E, Finger M, Collins W 1973 UCID-16189
[15] Steinberg D J 1991 UCRL-MA-106439
[16] Li M S, Chen D Q 2001 Chin. J. High Pres. Phys. 15 24 (in Chinese) [李茂生, 陈栋泉 2001 高压 15 24]
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[1] Chandle E A, Egan P O, Stokes J 1999 UCRL134657
[2] Zhang C Y, Hu H B, Li Q Z 2009 Chin. J. High Pres. Phys. 23 283 (in Chinese) [张崇玉, 胡海波, 李庆忠 2009 高压 23 283]
[3] Zhang C Y, Hu H B, Li Q Z 2013 Chin. J. High Pres. Phys. 27 884 (in Chinese) [张崇玉, 胡海波, 李庆忠 2013 高压 27 884]
[4] Walsh J M, Shreffler R G, Willig F J 1953 J. Appl. Phys. 55 349
[5] Asay J R 1976 SAND76-0542
[6] Asay J R 1978 SAND78-1256,
[7] Asay J R 1978 J. Appl. Phys 49 6173
[8] Andriot P, Chapron P, Lambert V 1984 Shock Waves in Condensed Matter Santa Fe, New Mexico, July 18–21, 1983 p277280
[9] Remiot C, Chapron P, Demay B 1993 High Press. Sci. Tec. 2 1763
[10] Resseguier T, Signor L, Dragon A 2007 J. Appl. Phys 101 013506
[11] Wang P, Shao J L, Qin C S 2009 Act. Phys. Sin. 58 1064 (in Chinese) [王裴, 邵建立, 秦承森 2009 58 1064]
[12] Liu J, Wang Y J, Feng Q J 2014 Chin. J. High Pres. Phys. 28 346 (in Chinese) [刘军, 王言金, 冯其京 2014 高压 28 346]
[13] Liu J, He C J, Liang X H 2008 Chin. J. High Pres. Phys. 22 72 (in Chinese) [刘军, 何长江, 梁仙红 2008 高压 22 72]
[14] Lee E, Finger M, Collins W 1973 UCID-16189
[15] Steinberg D J 1991 UCRL-MA-106439
[16] Li M S, Chen D Q 2001 Chin. J. High Pres. Phys. 15 24 (in Chinese) [李茂生, 陈栋泉 2001 高压 15 24]
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