debris dispersion effect in n-shape shield configuration

Paper number

IAC-13,A6,3,10,x19521

Author

Mr. Xuezhong Wen, China Aerodynamics Research and Development Center, China

Coauthor

Ms. Jie Huang, China Aerodynamics Research and Development Center, China

Coauthor

Mr. Fa-wei Ke, China Aerodynamics Research and Development Center, China

Coauthor

Mr. Zhaoxia Ma, China Aerodynamics Research and Development Center, China

Coauthor

Dr. Sen Liu, China Aerodynamics Research and Development Center, China

Year

2013

Abstract

Based on the fact that the dispersion degree of the debris in oblique impact is higher than that in normal impact, a new triple-walls configuration named N-shape configuration with  the middle wall obliquely placed is presented and studied in comparison with the normal triple-walls configuration. Hypervelocity impact tests and 3D numerical simulation (SPH) are carried out. Both of the two configurations are composed of the same material and possess the same area density and space. The dispersions of the debris clouds generated in projectile impacts and their damage to the rear wall are compared and analyzed.
    In hypervelocity tests with the normal triple-walls configuration, under the condition that the projectile diameter is 5.5mm and the impact velocity is 4.8km/s, there is a perforation with the diameter of about 2mm in the rear wall. However, there is no perforation in the rear wall of the N-shape configuration under the same impact conditions, but a debris dispersion area of an elliptic shape with the long side of 40mm and the short side of 34mm. The area of elliptic region is about 1068 mm2 compared with the area of 660 mm2 on the rear wall of the normal triple-walls configuration, so the damage energy density is smaller and the damage level of the rear wall is lower. Simulations according to the same impact parameters give results in consistency with the tests, that there is no perforation in the rear wall of the N-shape configuration, but a perforation in the rear wall of the normal triple-walls configuration, and the dispersion degree of impact debris in N-shape configuration is noticeable. In the range of 3km/s~7km/s, it is found that the dispersion degree of impact debris in N-shape configuration is significantly higher than that in normal triple-walls configuration.
    Under the impact parameters given in this paper, it is verified that the shield performance of the N-shape configuration is better than the normal triple-walls configuration with the same area density and space.

Abstract document

IAC-13,A6,3,10,x19521.brief.pdf

Manuscript document

IAC-13,A6,3,10,x19521.pdf (🔒 authorized access only).

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